as far as I know, the D90 (.. what a beast 😉 - and the price!!) records in 30fps, 1280x720 square pixel, MotionJpeg, .avi container ..
which is +a bit off+ the standards, FCE does support.. = rendering
I had the opportunity to 'play around' for some minutes with the D90.. and made some 'test'-recordings.. it is really breathtaking to use 'photography' techniqués while doing video, esp. FoD...
but..
have you seen that movie done with the Canon 5D II?
http://www.usa.canon.com/dlc/controller?act=GetArticleAct&articleID=2086
it offers some more
practical features, as automatic focus (=Nikon lacks that), and, even more important, the Canon allows to switch off automatic exposure (=in my tests with the D90, the pic 'pulsated' due to diff. light situaation) ...
==edit==
oops, Canon pulled that video.. too much bandwidth 😉
absolutely brilliant, perfect photography, even in low light condition, ... but 'motion picture' ..