Co-founders, MySpace (NWS)
Ages: 40 (DeWolfe), 31 (Anderson)
Despite mounting competition from the likes of Facebook, MySpace remains the most popular social-networking site in the United States, with more than 100 million users and reportedly up to 230,000 new registrations every day. With the recent purchase of Photobucket, which hosts a large share of the pictures on MySpace, the site's dominance over users' online lives -- and its appeal to advertisers -- will only grow. Ages: 40 (DeWolfe), 31 (Anderson)
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