I've been looking for my first DSLR too, and the DPreview review of the Pentax K-x is absolutely glowing. Not just video, but also in-camera HDR processing (although probably a pretty basic version). And the statement that it's the best low-light performance this side of full frame. And on top of that, US$550 with the kit lens at Amazon. $520 if you sign up for an Amazon Visa card. :-)

On paper this appears to be the best deal, by a good margin. But, it's not a Canon or Nikon, and I just wonder if it makes more sense to stick with the big two.