Boing Boing breaks the news. Apple's iTunes update quietly added the 'feature' of monitoring music played so Apple can suggest similar songs. This was not clearly stated during the install. Closing the 'mini-store' turns it off.
The Dark Side of Steve Jobs is to be feared. I've long felt that the only thing worse than Bill Gates ruling the world of personal computing would have been to have Steve Jobs in charge. Jobs is best when he's a distant #2, which is a good reason to hope Microsoft does claw back market share from the iPod.