Here are some highlights from this past week's earnings coverage on BloggingStocks:

• ADC Telecommunications Inc. (ADCT) posted a surprise net loss for Q4 and predicted a loss in Q1.
• BJ's Wholesale Club Inc. (BJ) shares fell after Q3 earnings met expectations and offered guidance for FY.
• Dell Inc. (DELL) posted lower-than-expected Q3 earnings, prompting a sell-off of shares.
• Foot Locker Inc. (FL) said Q3 earnings slumped more than analysts' forecast, sending shares lower.
• Gap Inc. (GPS) reported growth of EPS and revenue in Q3 and announced a share buyback program.

After-hours traders punished Dell (DELL) stock Thursday, following a weak third quarter earnings report from the technology giant.

Going into the afternoon earnings release, analysts had been expecting to see the company show earnings of 28 cents per share. Actual earnings came in much lower at 23 cents per share.

Analyst upgrades:

• Barclays upgraded Exxon (XOM) to overweight from equal weight based on a higher production growth outlook. The firm, which raised its target to $92 from $90, expects Exxon to have organic growth of more than 3% in 2010 and an average growth rate of 2.6% between 2009 and 2013.
• Kaufman Bros. upgraded Palm (PALM) to buy from hold citing the recent pullback in shares and indications that Verizon (VZ) will carry webOS phones as early as 1H10. The firm has a $16 target on the stock.
• Piper Jaffray raised Medicis (MRX) to neutral from underweight and raised its target to $20 from $16. Following a management meeting, Piper said they have increased confidence in Soldyn risk and LipoSonix's safety profile.
• Illinois Tool Works (ITW) was upgraded to buy from neutral at UBS.
• Devon Energy (DVN) was upgraded to outperform from market perform at Wells Fargo.
• Carmike Cinemas (CKEC) was upgraded to buy from neutral at Merriman.

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 latest litigation has Intel Inside.

The State of New York is going after Intel (NASDAQ: INTC) over antitrust allegations. State Attorney General Andrew Cuomo is accusing the largest chip manufacturer in the world that it is trying to secure a global monopoly for microprocessors.

For several years, Cuomo said that Intel has pushed the likes of Dell (NYSE: DELL) and Hewlett-Packard (NYSE: HPQ) to agree to the exclusive use of Intel's gear in exchange for billions of dollars in payments. The hefty cash outlays have given what Cuomo called a "stranglehold" on the market.

Once upon a time, retailers measured success by the number of people walking by in the mall, how many entered the store, the percentage they spent, and basket size. Now, a world of zeroes and ones has changed their perspective entirely. Social media is expected to be the star during the coming holiday season, with retailers pushing Facebook, YouTube, and Twitter content to get in front of consumers and affect either online or in-store purchases. Smaller Christmas budgets are expected, so the fight is on to garner as large a share as possible of a shrinking pie.

Of course, nobody would come out and say, "Social media is nonsense, and I'm not getting anything for my investment." So, when the likes of Starbucks (NASDAQ: SBUX), JCPenney (NYSE: JCP), and Target (NYSE: TGT) say that social media is connecting them with their customers and leading to more effective campaigns and product launches, do take it with a grain of salt. What can't be ignored, however, is that they're committing more resources to social media marketing, even though it's still far too soon to tell if it will be effective.

Windows 7, the latest operating system from Microsoft (NASDAQ: MSFT), is expected to help jumpstart some IT spending. Intel (NASDAQ: INTC) also sees this happening. A new operating system often means a chance to upgrade from dated equipment that isn't worth upgrading, especially with favorable pricing for technology right now. Everything's coming together for a strong 2010 for the high-tech sector, so it's also worth watching Hewlett Packard (NYSE: HPQ), Dell (NASDAQ: DELL) and EMC (NYSE: EMC).

If there was one stock you wish you had bought when it was being crushed by the financial crisis along with every entity out there, it's Apple (NASDAQ: AAPL). Shares of the company, which counts Microsoft (NASDAQ: MSFT) and Dell (NASDAQ: DELL) as rivals, have more than doubled since they hit a 52-week low of around $78 per share. Really, did we think this one wasn't coming back? Hey, I fully admit, I've been a bear on Apple at different points during the downturn. Difficult not to be, with consumer sentiment and all that.

Well, it's hard to be a bear now. Last night, the market welcomed Apple's Q4 earnings with open arms. How could it not? The first paragraph of the press release tells a story of profound growth. Sales increased 25%, and earnings per share soared over 40% to $1.82 per share.

While the tech sector has held up fairly well during the economic downturn, the dealmaking has lagged. But lately, there has been an uptick activity, such as from companies like Dell (NASDAQ: DELL) and Cisco (NASDAQ: CSCO).

Well, according to Reuters, it also looks like Google (NASDAQ: GOOG) is setting its sights on mergers and acquisitions (M&A).

Economic recovery starts on the ground. So, while it's nice to hear the likes of Stephen Schwarzman celebrate the return of IPOs and hefty exit strategies, the real indications that the economy is turning the corner will come when companies start to open their wallets and spend.

After dealing with only the have-to-haves for a while now, companies can start to make the improvements they've been putting off. Dell (NASDAQ: DELL) CEO Michael Dell sees this happening in the IT space, with companies expected to ramp up their hardware spending aggressively.