Sheryl Sandberg's right! We've teased Facebook's overserious COO for talking up Facebook's need to sign up more users before figuring out how it's going to make billions of dollars off of them. But analytics firm eMarketer says only 42 percent of the Internet-using world knows about social networks. Translation: A lucky 58 percent are not burdened with worrying about whether they've made anybody's top friends list. Heck, while we're at it: Less than a quarter of the world's 6.6 billion people have access to the Internet. That means 5.97 billion people have no reason to have ever heard of Sandberg, let alone blame her for global warming, violence in the Middle East, and cat allergies. Not yet, anyway.

Due to a souring economy and a shift in spending from Facebook itself to third-party developers who place widgets on the social network's site, market research firm eMarketer lowered its projections for Facebook's 2008 ad revenue from $305 million to $265 million. eMarketer expects ad spending on widgets and applications — which goes to their makers, not Facebook — to reach $40 million this year.

Why all the lists heading into 2008? Well, laziness. That, and the urge to reflect on the year gone by. No, mostly laziness. And in that spirit, we present you Valleywag's top 10 list of top 10 lists. Oh yeah — our lazy, it's meta.