Quietly useful social network LinkedIn outgrew Facebook from October 2006 to October 2007, according to numbers from Nielsen/NetRatings. In that year, Facebook grew 125 percent to LinkedIn's 189 percent. Too bad LinkedIn CEO Dan Nye, who's been hinting at an eventual IPO, can't come close to matching Facebook founder and CEO Mark Zuckerberg on Steve Jobs impersonations. Proclaiming your company will change media for the next 100 years will get you laughed at on Valleywag. Laughed at all the way to a $15 billion valuation.