Ed - there should be no reason for all three HDR shots being taken on one shutter release, the K20 already does that for auto bracketing. The way the article is written, it mentioned one one touch for HDR (or at least that's how I interpreted what I read). I've had varying results with hand-held bracketed shots using the K20's one touch option and Photomatix, some very good and some horrible. It partly depends on the particular picture and just how far off you are.
Scott - I'm having a harder and harder time resisting being an early adopter. I keep hoping lots of people will tell me how awesome the 60-250 is so I could justify buying the lens instead of the K7.