Look out, Google, here comes Clusty - Free consumer Web search service launched yesterday clusters results into categories to make them easier to sort SAN FRANCISCO - Google executives have long conceded one of their great fears is to be overtaken by a more advanced Internet search technology. Vivisimo, a company founded by three former Carnegie Mellon University computer scientists, hopes to prove their worries are well founded. Four-year-old Vivisimo launched Clusty yesterday, a free consumer search service based on results from Yahoo's Overture engine. Vivisimo already offers a search service for corporate customers, which clusters results into categories to...