I agree with Rhettdean, it is a second nail in the coffin when you have to start the download of a TV or Movie being rented from iTunes on the ATV2 because you left the screen where the download is being done. Apple told me I should be able to do other things while the download was running, nope you can't.
Another thing is there is no notification when the show or movie is ready for viewing, like in ATV1.
Think the ATV2 is a great product and also own the ATV1 (in the closet at this time), but they need to do some work on it. Wouldn't it be great to have an App store available, or maybe some plug extra storage.