Apple have updated their iMovie app for the iPhone 4 to 1.1 so that it now adds support for the new 4th gen iPod Touch. I wonder if they’ll ever bring this to the iPad though? Surely with more screen size it makes a lot of sense.
iMovie updated to 1.1 for iPod Touch
Maybe it requires iOS 4.0+ API? That would explain why it's not available for iPad.
Yeah, that's probably it