Google (GOOG) just picked up another promising startup in its effort to gain some ground in the online visual advertising market. Teracent, which was formed three years ago, is becoming part of the search engine giant.

Yahoo! (YHOO) currently leads the market in display advertising sales, and Google has been trying push into the space. Last year, this led to its acquisition of online ad service DoubleClick, but that was a first step rather than a total solution to Google's display ad ambitions.

Twitter is on the prowl. Though it made its last acquisition more than a year ago, company founder Biz Stone said on Tuesday that it's looking to add to the stable. There aren't any specific targets yet -- at least none revealed -- and Twitter is keeping its options open. The likely pool of potential acquisitions consists of third-party Twitter application developers, which is largely responsible for the micro-blogging service's growth in popularity.

Stone, one of Twitter's founders, said at a Tel Aviv news conference, "As our attention is grabbed by some of these developers, we will take a hard look at them." This refers to companies that develop applications for Apple's (AAPL) iPhone and Research in Motion's (RIMM) Blackberry. It also refers to developers for the Web and desktop, such as HootSuite and TweetDeck.

Twitter calls Google (GOOG) a "good role model," but says it isn't ready to rush down the road to advertising.

Nonetheless, an ad-based revenue model is something that cofounder Biz Stone says they "will be looking to do down the line." But, for now, he continues, Twitter is focused on "creating value for our users." For now, revenue generation ideas are being put on paper, "and we're definitely going to get to them," Stone says.

We've put three quarters behind us in 2009, and the most recent one was merely another miserable step downward for the beleaguered newspaper industry. Total ad revenue plummeted in the third quarter to $6.4 billion for the print jockeys, a decline of 28%. This info from the Newspaper Association of America drives home the notion that conditions will only worsen for the newspaper industry. So, if you're hoping those shares of New York Times Company (NYT), Gannett (GCI) and Washington Post Company (WPO), holding your breath will leave you little more than dizzy.

Of the total advertising revenue generated in the third quarter of 2009, $5.8 million came from print, the lowest quarterly amount this year. The $623 million in online advertising sold by America's newspapers was also 2009's worst. Both are down substantially from the same quarter in 2008, when the newspapers posted print ad revenue of $8.2 million and online ad revenue of $750 million, according to NAA data. At this time last year, we lamented year-over-year declines approaching 20%. Now, we have the same feelings as ad revenue drops approach 30%.

Michael Moe knows how to make headlines: Talk about Twitter and predictably people will bite (I'm proof of that). He led the team at NeXt Up Research that calculated the value of the micro blogging service and arrived at $526 million to $674 million -- half what Twitter is generally believed to be worth.

Really?

The team estimates that Twitter will generate revenues of $114 million to $134 million in 2013. In 2014, Twitter is expected to post revenues of $126 million to $148 million. This is far more conservative than the valuation implied by the company's most recent round of venture capital investment, which puts the company's worth at more than $1 billion.

The Twitter ecosystem may be changing constantly, but most of that comes on the back of individual developers and outside companies. They beat on Twitter APIs to create new products that may win them glory, recognition or cash. Over the past month, though, Twitter itself has gotten into the game, releasing or announcing a handful of new features.

A new function for "retweeting" (echoing another's tweet to your own followers), changes to how trending topics are managed, and the ability to create lists are new tools intended to engage users ... on the Twitter.com website. Considered within the context of Twitter's changed terms of service this year, the upgrades may be part of a broader ad-based revenue plan.

The number two search engine in the United States turned in a fantastic third quarter, far ahead of expectations. Cost-cutting, layoffs and business divestitures led to a surge in Yahoo's (NASDAQ: YHOO) profits and a 4.8% increase in share price in extended trading on Tuesday evening. Net income more than tripled to $186.1 million (13 cents per share) from the third quarter of 2008's result of $54.3 million (4 cents a share). Sales (exclusive of fees passed to partner sites) reached $1.13 billion, slightly above the $1.12 billion expected by analysts, according to a Bloomberg survey.

With the advertising market in rough shape and competition from Google (NASDAQ: GOOG) continually rising, Yahoo refocused on its core properties: the home page, messaging and mobile services. The company trimmed what it didn't need, which is why it was able to boost its earnings even with a decline in revenue. Increased ad revenue from auto manufacturers, travel companies and consumer product manufacturers also helped.

Yahoo's chief financial officer, Timothy Morse, says that the company's markets are "starting to stabilize." Of course, Yahoo itself must be doing something right: its share price is up 41% this year.

Facebook is making the biggest ad splash since Google, according to an article in the Financial Times.

More than four-fifths of the largest advertisers in the United States have turned to the social networking platform to promote their wares -- after several years of fearing these types of communities. The lure of Facebook must have been too much to resist, with 340 million monthly unique visitors. Now, it's not unusual to see the likes of Johnson & Johnson (NYSE: JNJ), Nike (NYSE: NKE), and AT&T (NYSE: ATT) advertising in this world.

"Google (NASDAQ: GOOG) remains the dominant search engine on the web," notes Paul Tracy. In his StreetAuthority Market Advisor, he views the stock as a solid buy for growth investors.

"In economic downturns, one of the first costs most companies cut is advertising. Not surprisingly, over the past year, most companies have slashed their advertising budgets in response to the severe economic downturn.

"But online ad spending has remained remarkably resilient. GOOG's system targets specific ads based on what users type into their search box, geographic location and other factors.

The recession hasn't squashed the spirit of college athletes, it likely won't slow down the creation of office "bracket" pools, and it hasn't stemmed the tide of online ad revenue flowing into CBS Corp. (NYSE: CBS), which is nearing the end of its 11-year pact with the NCAA for March Madness broadcast rights. (The deal expires in 2013).

A week before the NCAA Tournament begins, CBS has already sold nearly all of its online ad inventory, according to The Wall Street Journal. Just 35 companies -- including Coca-Cola (NYSE: KO) and General Motors (NYSE: GM) -- have bucked up for these streaming ads.

Yahoo! Inc. (NASDAQ: YHOO) newly-minted CEO Carol Bartz has been on an open-ended tear recently, admitting what is broken at the company and even admitting that she uses a competitor's mapping product instead of the one produced by the company she now leads.

That's all well and good, but real change needs to come forth at Yahoo! for the company to know what it is supposed to be doing. Bartz has 2009 to prove that change is not being talked about, but is happening.

Shares of the Washington Post Company (NYSE: WPO) are trading in the red this morning after the company reported that its fourth quarter profit dropped by a massive 77%. Net income came in at $2.01 per share, verse $8.71 per share in the same period last year.

As I noted in the earnings preview yesterday, the company's flagship newspaper and its magazine division (Newsweek Magazine) have been hit hard with losses in advertising revenue, and both had a dismal 2008 year. The company's newspaper division lost $14.4 million in the fourth quarter and had a $192.4 million operating loss for the entire 2008 year. Its newspaper division had a slight profit of $10.9 million in the fourth quarter, but on a full year basis it posted a loss of $16.1 million.

Tomorrow morning before the bell, The Washington Post Company (NYSE: WPO) will have its chance to impress Wall Street when it reports its fourth quarter numbers.

Going into tomorrow's announcement, analysts are expecting the company to show earnings on the quarter of $8.17 per share. Should the company hit this estimate, it would be a decline of 16.5% from its reported $9.79 during its fourth quarter 2007.

The most famous search engine in the world, Google (NASDAQ: GOOG), reported third-quarter numbers on Thursday after the market closed for the day. They were pretty good, all things considered. But hold on before buying the stock. Let's get to the data first.

Google saw its top line increase over 30% to $5.5 billion. On an adjusted basis, earnings per share came in at $4.92 per diluted share. That was good for only a 6% rise in the bottom line, but it did handily beat analyst estimates. According to this source, expectations were for $4.75 per share. Even better, net cash from operations soared just about 34% to roughly $2.2 billion. There's no question that Google has a good advertising model with its search-based technology. Indeed, Google is an innovative leader and a major brand on the Internet. It offers an efficient way for advertisers to target users who might be interested in their products. And it's true that an advertiser can see what it's getting for its investment. Even competing against big guns such as Microsoft (NASDAQ: MSFT), Yahoo! (NASDAQ: YHOO), and Time Warner's (NYSE: TWX) AOL, Google more than holds its own (although I'd really like to see management make better use of its expensive YouTube acquisition -- check out this article by Sheldon Liber on the subject).

Today might have been one of the more boring options expiration dates. If you pretend that technology stocks weren't a part of the market, today was rather stable considering the major bounces we have seen. Oil stayed under $129.00 per barrel, which didn't give the bears much meat to chew on. We had essentially no government economic data today. Here are today's unofficial closing levels:

• DJIA 11,496.24 (+49.58)
• S&P500 1260.65 (+0.33)
• NASDAQ 2282.78 (-29.52)
• 10YR T-Note 4.081% (+0.043%)
• 52-WEEK LOWS
• Top Analyst Upgrades
• Top Analyst Downgrades

Apple Inc. (NASDAQ: AAPL) is set report earnings after the close of trading. Read a FULL EARNINGS PREVIEW. Shares of Apple were down over 3% at $166.10 in today's final minutes of trading.