Pandora-like Recommendations for Twitter

Developers: is it possible to build something like a Pandora-like algorithm for Twitter? Not just a text-based search feature, but something a bit more sophisticated? Here’s what I have in mind:

Is this do-able? Does it make any sense? Would such algorithmic innovations pave the the way for Search.Twitter to be a game-changer in search on the web? I’m a dope when it comes to these things, help me.

Is it possible to make music out of the noise on Twitter?