Somewhere, someone is buying into a $35 billion valuation for Facebook, if it were to go public. I'm struggling with this. Let's be realistic. Google, Inc. (GOOG) has a market cap of $137 billion. Apple, Inc. (AAPL) comes in at almost $210 billion. Does Facebook really have 25% of the "goodness" (that hard-to-pin-down quality that translates to value) of Google? 17% of the goodness that is Apple?

That's a hard one to swallow.

Do you remember when MySpace was all the rage? Of course you do. Then came Facebook; then came Twitter. Something else will come along, too. Unfortunately, though, News Corp. (NWS) committed itself to MySpace by buying it back in 2005. What a mistake that was.

I'm sure everyone knows about the growth problems at the social-networking site. This recent article at Reuters discusses them. Morale at the company appears to be waning. Unique visitors aren't what they used to be. An ad agreement with Google (GOOG) is about to expire; any new transaction on that front may not be as valuable now that MySpace has been relegated to not-as-cool-as-it-used-to-be status.

The December 2009 data from comScore (SCOR) were released Tuesday, and the results for the social media sector are nothing short of staggering. Fifty-four percent (112 million) of the 205 million-strong U.S. internet-user population are on Facebook, with 27% (57 million) still using News Corp.'s (NWS) MySpace. But according to data from both comScore and Experian Hitwise (EXPN), the most active users were on Tagged, MyYearbook and Orkut. And Facebook users were more active than those on MySpace.

There's no doubt that plenty is happening in the social media space, but there are some facts that just might surprise you, either because of the speed of change or the discovery of players that may not have occurred to you.

You'd think retailers would flock to any place where they could find 400 million people. With the sixth anniversary of Facebook closing in, its robust user base still hasn't opened the eyes of many retailers.

Despite all the Black Friday social media engagement this year, a substantial 75% of the top 100 online retailers don't have a formal presence on Facebook, according to a study by ForeSee Results. Another 25% haven't even hit 10,000 fans.

Has Facebook found its edge on Twitter? The largest social networking site in the world, with more than 400 million users, has struggled to strike a decisive blow against the microblogging service, which surged to a user base of 60 million last year. Despite the large disparity in members, the two have been fighting for ownership of the "status update." The latest data from Facebook, however, shows that it may have an angle for beating Twitter.

According to Facebook-watcher InsideFacebook, 25% of the company's 400 million users access the social media platform from mobile devices, putting it squarely in Twitter's domain. That's 100 million mobile users, putting it up 67% relative to Twitter. The battle for status from mobile devices is where you'd expect to see the fight fought, but the other utilities being accessed from smartphones may ultimately determine the winner.

As Facebook passes the 400 million user threshold, a flight from social media is beginning to take shape. A growing number of users are reconsidering the sharing (and oversharing) of life details. Reasons vary -- from seeing their networks swell from just close friends to distant connections and strangers to worries over where their personal information can wind up. More than anything else, they say they want to return to "real life."

Depending on how this shakes out, the trend could force social media company employees to get back to real life as well. If the backlash gains momentum, it could cost these companies traffic, which translates to a revenue hit and, in the extreme, viability. Yet, if the likes of Twitter, LinkedIn and Facebook can weather the storm, they will come out the other side stronger than they are now.

The Twitter-verse continues to get interesting. I've always felt that the returns are to be found around Twitter rather than with Twitter itself, and the venture capital community seems to be acting from the same position. Twitter interaction platform HootSuite just announced a new round of venture capital funding, with $1.9 million in fresh money coming in the door to support its growth efforts.

HootSuite, which was started by Invoke Media in November 2008, has evolved into a brand monitoring, file-sharing and social media integration utility. Only a year later, it has attracted more than 300,000 users, from Time (TWX) to Martha Stewart to the White House to Aol (AOL).BloggingStocks is among the Aol blogs using HootSuite.

Look, 2009 was a "flush" year. Market rallies were constrained by the low baseline set at the end of 2008, unemployment was high and caution defined nearly every corporate decision. The travel market sucked. The art market sucked. The financial industry labored on with the support of taxpayer money while 140 banks were forced to call it quits. So, we turn to the new year, as yet undefined, for excitement of the type we want ... and it seems likely to deliver. As Nero played from the rooftops, the social media industry inched forward to the climax we hope to see this year -- the initial public offering.

The action hasn't really begun, and the signals emitted are open to various interpretations. Nonetheless, Facebook's new dual-class stock structure is hard to miss, as it would protect the influence of early entrants to the company -- either as investors or options-compensated employees in the event that the 350 million-strong social networking site brings ownership opportunities to the public.

The murky waters of the social media space just got a little clearer. An environment famous for having gray areas found boundaries in a Wisconsin courtroom Tuesday when a local teenager pleaded no contest to two felonies.

The student, Anthony R. Stancl of New Berlin, blackmailed more than 30 of his fellow students into committing sex acts by using photos and videos he pulled from their Facebook pages.

It was only a matter of time. This week, social media platforms Twitter and LinkedIn announced new features that will undoubtedly appeal to corporate marketing departments, so Facebook hopped on the bandwagon. Its new preferred developer program is a step toward structuring the Facebook application development and services space, by endorsing providers known to the company.

The program is still in its infancy, which means there isn't much structure around it. According to AllFacebook, "[T]here's really no way to apply to be in the directory aside from being connected with the people over at Facebook." Fourteen vendors are already listed in the directory.

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.

Yahoo! (YHOO) is the latest company that wants to optimize its search results for Twitter. This follows moves by Microsoft (MSFT) and Google (GOOG) to integrate Twitter data into their search results. Unlike its competitors, however, Yahoo! wants to do this without spending a dime (well, without giving a dime to the hot new social media platform).

Twitter's microblogging service has become famous not only for its rapid growth but also because it's found no way to turn it into revenue. Its recent discussions with Microsoft and Google demonstrated that Twitter can indeed bring in some cash -- by licensing its data for use in fine-tuning search engines. With two of the top search engines now optimizing for Twitter, it was only a matter of time before Yahoo! would rush to join the party.

An unemployment rate of 10.2% means that serious jobseekers are using every tool they can find. So, it's not at all shocking that social networking tools top the list, with LinkedIn, Facebook and Twitter leading the charge. Openings are being tweeted, hints of a new position are being monitored and hot candidates are being hit up directly, even if they aren't saying they're on the prowl for a new gig. Social media is a tool to use in a job hunt but not necessarily the only one, according to Challenger, Gray & Christmas. Instead, it makes sense to balance a search with many tools.

John Challenger, CEO, says, "The job search has changed radically over the last two decades with the advent of electronic mail, the internet, social networking, smart phones, etc. However, it is important to remember that all of these technologies simply enhance the job search; they will never replace the face-to-face connections that are critical to a successful search." But, he continues that "we feel that these new networking tools are essential and now advise all of the job seekers going through our program to open LinkedIn accounts and to consider other services such as Facebook and Twitter.

Imagine taking the personal connections and interactions that occur every day on the likes of Facebook and Twitter... and bringing them to bear on an education. To a large extent, this hasn't been done yet, but the potential is profound. In a new report by the Center for Community Survey for Student Engagement, two-year programs aren't taking advantage of the tools at their disposal -- plenty of growth is still possible. Kay McClenney, director of the CCSSE, says, "Colleges are not taking advantage of that particular set of tools for making connections with students to the extent that they could."

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.