This is very cool- Ive been wondering it there was a way to do this and am glad to see someone has. I personally would go with a Canon T2i, simply because its lighter (and cheaper- it WILL eventually crash)- but dang! Great great video! Thank you to the forum readers who tipped me off to it!

Aerial video with a Canon 5D , 7D helivideo.com from Eric AUSTIN on Vimeo.