It's an unfortunate fact that the speakers at some conferences can be self-serving; few people are going to go onstage and not promote their own company, never mind admit its faults. However, when it comes to social media, it's hard to accuse the Wharton School of the University of Pennsylvania of bias, and so an OMS keynote on the subject run by two Wharton representatives was rather informative. (Coverage of the Online Marketing Summit 2010 continues at WebProNews Videos .