Spock have just opened up beyond their private beta and promise to be the most comprehensive people search tool on the interwebs.. Their model is interesting because they aim to combine wikipedia style editing with a single focus.. people..
Roelof and i had long discussions in the past, around someway to get people to update information on people while growing the db and still having people contribute.. Interestingly, spocks simple sounding approach might be perfect.. in a day when everybody vanity googles themselves, and when the facebook/myspace/twitter generation have 0 qualms about informing the world what they are doing 24/7, the simplest way to populate a db with information about people, might just be to let them fill the info in themselves..