Has any celebrity tied himself so closely to a technology product as Ashton Kutcher with Twitter? It's doubtful, and yet Kutcher hasn't received a dime for his defacto endorsement. That's not lost on the actor.

Kutcher pointedly notes his lack of compensation in the attached clip from Monday's Tonight Show. He even mentions equity; is Kutcher hinting he'd like some pre-IPO shares in the hot microblogging startup? He's certainly put in sweat equity, and not just by uploading pictures of his scantily-clad wife: Kutcher has posted some 3,000 tweets to his 3 million followers. Oprah Winfrey, in contrast, has written just 56 tweets, to 2 million followers.