With a lot of hubbub and some fanfare, Twitter rolled out their "Promoted Tweets" program today, i.e. advertising.

In articles from AdAge and The New York Times, the Promoted Tweets platform will enable businesses to inject their messages into the Twitter stream without getting lost in the constant stream of information. The service rolled out first with search results, and will later, according to reports, enter both Twitter.com streams and third-party apps such as TweetDeck and Tweetie, which was snatched up by Twitter last week.