Interestingly, Apple is requiring people who want to use iTunesLP and iTunes extras with the new AppleTV 3.0 to re-download their content. We're not sure why but perhaps Apple had a last second change of format since the iTunes LP/extras format was released a few months ago.
Also, the Apple Remote has been updated to 1.3.2 to work with AppleTV 3.0 and iTunes 9.0.2.