Spock, the Redwood City, Calif. search engine for people, launches tomorrow after a year of suspense.

It has remained secretive for months (see our original coverage), testing its engine, adding some 100,000 profiles and inserting other social networking features. In those past stories, we showed examples of how profile pages of people contain all sorts of information about people.

We asked chief exec Jaideep Singh how he plans to make money. He said the company will serve ads next to searches just like Google does, though it will wait a few months before doing so.