It appears that Nikon has not really invested that much in video yet. As often, I feel that this is mostly the result of a lack of motivation of some key influencers inside their organization. Their engineers have some pretty strong views about what a camera should be, they are typically less influenced by their marketing Dept than Canon.
Their next generation might be the real deal but as of now Canon sure appears to be a better bet as far as video is concerned.
I'd like Nikon in this game, because honestly, I find the Nikon's approach real "photographic". Maybe I'm snob or whatever, but the Nikon's files are better to me than Canon's, they have a style that I find more "serious" while Canon is more "mass-style". I'm explaining this very badly, I realise that my english reach its limits there.