The final version of Photomatix Pro 3.1 came out over the weekend. I downloaded it and played around with one of the RAW images from the recent trip to Yosemite. Since I didnt have any bracketed exposures to work with, I took the RAW file into Photoshop CS3 Bridge, then wrote out 3 .tiff files with exposure settings of -2, 0 and +2 respectively. Tossed them into Photomatix and let it work its magic!
Interesting if nothing else, need to try some more of this, although it's clear that in the dark areas of the photo the Powershot G6 has noise issues.