The Canon 5D Mark II has been used to shoot commercials and portions of shows
The Canon 7D also shoots 1080p video, but it's hard to recommend the 7D at $1000 more than the T2i.
I just got a Canon Rebel T2i (550D in Europe) and while the quality is good for the $900 I paid, it can't replace a prosumer HD cam.
The T2i does 1080p at 24/25/30 fps and 720p at 50/60.
It's still good enough to act as both a DSLR and a consumer HD camera though.
*EDIT* Make sure there's ample light or your video will be recorded at a high ISO.