Google's efforts in social networking haven't always paid off. Google Chat, an instant messaging feature, hasn't been compelling, at least not compelling enough to make a dent in AOL's ( AOL) IM. And Orkit, Google's own six-year-old social networking service, has had limited success overseas, but nearly no recognition stateside. While Google tries to stay apace with Twitter and Facebook, Wall Street eagerly searches for the next Google. --Written by Scott Moritz in New York Follow our tech coverage on Twitter and become a fan of TheStreet.com on Facebook.