There was a Nikon D90 on display at our last user group meeting, and I was intrigued by the fact that it is capable of HD video.
I also heard that there was a roughly equivalent Canon available, I think it was the EOS 5D Mark II, but I could be wrong. I've been using Canons so I'm disposed that way.
A guy I was discussing this with while we looked over the Nikon said he would be staying with Olympus for now due to the legacy lens issue.
Stay away from DSLRs with video. The large sensor causes "worbling" in fast motion video:
http://www.youtube.com/watch?v=t0i5rmwPPNQ
You need an actual Camcorder with a sensor that's made for video. That's why video on the small P&S are actually kinda good - the sensors are small like on the camcorders...