Are we absolutely sure that the wallpaper rotates and that there is no possibility of there actually being 2 images? One 768X1024 and the other 1024X768? Anyways there are 100's of iPad wallpapers over at iPad Tablet Central. Check them out!
According to the video below, we will be able to choose different pictures for the lock screen and the wallpaper. It doesn't look like we can choose different ones for portrait and landscape. Things could change though.
64GB Wifi iPad Owner
I love this one
I love iPad tablet