Jeff Widman has been cited an expert in Facebook EdgeRank and analytics by the Wall Street Journal, AdAge, Wired Magazine, and InsideFacebook. His Facebook marketing agency BrandGlue helped YouTube grow from 6M to 17M fans using purely organic tactics. Other clients include Microsoft, Intel, Washington Redskins and Mint.com.
He got so frustrated by the lack of a decent Facebook analytics tool that he started PageLever. Currently PageLever measures more than 350 million Facebook fans across the fan pages of their beta testers, including stats you can't get elsewhere, like what percentage of fans you're reaching through the EdgeRank algorithm, and how many fans' comments came from mobile.