Serial entrepreneur and CEO of UberMedia Bill Gross launched his latest venture Chime.in (we reviewed the service here) at Web.2.0 Summit in San Francisco this week. But with Facebook, Twitter and Google + to keep on top of do we need yet another social network? Bill Gross says Chime.in is a network based on you and others’ interests, he thinks social is the future of search and therefore will be key to how we purchase online.