Update to iTunes Coming Soon
Probably not completely unexpected, but here are some clues. This recent AppleCare article on Windows Vista and iTunes compatibility: "iTunes 7.0.2 may work with Windows Vista on many typical PCs. Apple recommends, however, that customers wait to upgrade Windows until after the next release of iTunes which will be available in the next few weeks." This time frame jibes with the AppleTV specs page that had at one time listed iTunes 7.1 as a requirement (it now just lists "iTunes 7"), and AppleTV is due to start shipping this month.