It actually looks pretty good. The landing page really spells out what it's all about. I wouldn't use it personally since I don't think the overlap between "obsessive tweeters" and "girls I want to date" is large, but I'm not your target market.

How do you plan to contact people with this "Like" button though? I thought it was not, in general, possible to contact random twitter users unless they follow you? Also, isn't it slightly evil and spammy to contact users who haven't signed up for your service?