Twitter, the microblogging service, is gradually evolving its design on end user profile pages, and the CSS code may contain more clues.

Twitter _ Definitions    
Twitter_Definition 2

At the moment, the advertising placed on the pages is ‘internal advertising’ for Twitter services like Search, and its Widgets, but in the future – well, they are short, unobtrusive and perhaps easily able to adapt themselves to fit your tweeting style?

TweetSense advertising? Makes perfect sense to me. What do you think?