Is Twitter To Facebook As Google Is To Yahoo?

There's one major hang-up, though. While it may have taken the best feature of Facebook and built a company around it, Twitter missed one key point: You have to own the audience.

Twitter does not own its audience. Applications like TweetDeck and Twhirl do. And while those app providers are beholden to the Twitter API to power their tools, they're not affiliated with Twitter, nor do...