Apple to announce something special on the iTunes site tomorrow

The iTunes U.S. site has been updated with a very curious banner. “Tomorrow is a just another day. That you’ll never forget. Check back here tomorrow for an exciting announcement from iTunes.” A very clever marketing trick employed by Apple, it’s bound to have everyone talking about it. 90 second song previews? Official announcement of PING on the iPad? Facebook/iTunes integration? Since Apple are pretty good at keeping secrets, it wouldn’t be surprising if it turns out to be something that nobody has heard of before. What do you think the exciting announcement will turn out to be- will it be something life-changing or something forgettable?