MC Hammer already proved that you only need one hit record. But can you get by with just one search engine? Not if you believe his pitch to the Web 2.0 Summit this week, which promoted a "deep search" technology called WIREDoo. The rapper-approved tool emphasizes relationships rather than keywords, which yields very different results to Google's. Type in 90210, for instance, and instead of pages of links about the TV show, the pre-beta WIREDoo brings up stuff about the neighborhood
