Anewman: Last time I checked, there's no such thing as a "pro camera" versus an "amateur camera" - and without a specific model listed, there's no way to tell what level he's looking at. Factually speaking, the instant you make any money from a photograph, the camera you used technically is a professional camera, as that is the only difference between professional vs amateur. As for "capabilities", again, without any specifics, there's no way to know what is being referred to. The K10D is a brand new model and is much higher-end than the earlier Pentax DSLRs so it's possible that he's not aware of it, and if he already has an investment in Pentax lenses, then it's something that he may want to consider.
Anyway, that's neither here nor there. Yes, I did take your message as a swipe at Pentax, as I'm pretty sure that you knew the answer before posting the question. I would think it would be like someone posting "Does it have depth of field preview?" every time someone recommended a D50 as a competitor to an XT or an XTi. That is just as important a feature to some photographers.