Something we just finished up recently. Had a lot of problems doing VFX with the 5d before because of the jello effect. Got a halo rig/fig rig type set up and the image became so clean and smooth. Check it out.
NEW UNLOCK - YouTube (http://www.youtube.com/watch?v=_kSxpMQQ3HY&list=UUj9KZ7JN1mqs6xmE4opNE-A&feature=plcp)

it looks not perfect, but very good, and a lots of fun :)
thanks for sharing :)