Somone posted this really interesting clip inter-cutting Red, 5D2 and GH1 footage on dvxuser. Amazingly, it's pretty seamless once they are all graded together.
For some of the GH1 shots a hot rod adapter was used that allows the use of PL lenses. I think the nikkor lenses are by far no match for the Ultraprimes but still; Don't you find it as bizaar as I do, to have a setup where every single lens is worth like 20 times more then the camera itself?! ;)