I was looking over the new iTunes features page and saw these two items that appear to be a possibly great new feature. Unfortunately, it doesn't seem to be working yet, or at least I can't get it to work. If they are going to allow streaming iTunes over the internet to a remote computer, it shouldn't be too difficult to implement this on the iPhone and iPod Touch, which would be a killer feature.
and
Shared
Look under Shared to see music, video, podcasts, audiobooks, and other media in the iTunes libraries of computers on your local network. With Home Sharing enabled, you can import movies, music, TV shows, apps, and more from up to five authorized computers in your home. Enable Back to My Mac, and you can play media from your iTunes library at home using any Mac, anywhere. The library of your remote Mac also appears under Shared.
Look under Shared to see music, video, podcasts, audiobooks, and other media in the iTunes libraries of computers on your local network. With Home Sharing enabled, you can import movies, music, TV shows, apps, and more from up to five authorized computers in your home. Enable Back to My Mac, and you can play media from your iTunes library at home using any Mac, anywhere. The library of your remote Mac also appears under Shared.
and
Back to My Mac
With Back to My Mac, you can access your iTunes library wherever you are. On your Mac at home, turn on sharing in iTunes preferences and enable Back to My Mac in System Preferences. Then, on any Mac, sign in to MobileMe. Your library will appear in iTunes under Shared, and you can play your music, movies, TV shows, podcasts, and more.
With Back to My Mac, you can access your iTunes library wherever you are. On your Mac at home, turn on sharing in iTunes preferences and enable Back to My Mac in System Preferences. Then, on any Mac, sign in to MobileMe. Your library will appear in iTunes under Shared, and you can play your music, movies, TV shows, podcasts, and more.