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Just export to iTunes in the app, and then, when your iPad is connected, go to the 'apps' tab, scroll down to file sharing, find iMovie, and save teh relevent video!
Hope this helps, remember to mark this as Correct or Helpful appropriately!
Depends on how big they are. Obviously, you probably can't email them. Some you can, and I have, but most get too big. You can use MobileMe which is what I do. It compresses the movie for me and then I can load to my account and view on PC, or any PC, iPhone, iPod, etc... anytime I want. Great product in my opinion.
The biggest problem with the movies is just typically the size. I'd also suggest doing a Bing or Google search on the subject. People are always coming up with ways, new software, apps and such and you might get a faster answer then here on the forums.
Sorry about that. I thought, when exporting to iTunes, there would be an option to export in a choice of formats, but obviously not.
If you can, try exporting to your camera roll. You can then access this on your PC (just through Explorer I think), you should be able to copy the file and play it in Quicktime player or iTunes.
You can find out how on the iPhone version below, however the process is very similar for iPad. It should be in the same place as the export to iTunes option anyway.