MC Hammer has announced WireDoo, a new search engine focused on "deep search" and relational topics.

Most search engines are built on links and keywords, explained Hammer at the Web 2.0 Summit in San Francisco. Google and other search engines aren't as strong at connecting keywords to related topics — something he called relationship search.

Hammer explained a search for a car is not just about the car, but about the model, the mileage, the specs and even the zipcode (you likely want to buy from a local dealer). A search for a home is related to the surrounding community, schools, neighborhood condition and other related concerns. "It's about relationships beyond just the keywords," Hammer said on stage.

To address this issue, Hammer launched WireDoo, with the tagline is "Search once and see what's related." The rapper and entrepreneur didn't reveal much more about the search engine, beyond that it can bring up related topics to a search query in multiple verticals, including finance.

It's important to note that Google Search does take into account keyword relationships, but Hammer believes that the search engine that his team has built — a project more than two years in the making — will prove to be more useful due to its focus on relational search.

WireDoo is currently in pre-beta, but we're interested to see what Hammer and his team are going to do. Taking on Google on its home turf is almost an insane proposition, though, so it will take some secret sauce nobody else has ever found to take on the king of search.