Paul, thanks for starting this, what a fantastic idea.
I have very recently bought a Samsung GX-1S which I believe is essentially the Pentax *ist DS2 with different badges. It's like a smaller, lighter, simpler K10D, but so far the images have been just as good, especially with Takumar lenses.
Samsung GX-1S with Asahi Super-Takumar 28mm f/3.5 M42 lens plus 10mm extension tube. Direct export from RAW to JPEG in LightRoom, no processing.
Samsung GX-1S with Asahi Super-Takumar 55mm f/1.8 M42 lens. Direct export from RAW to JPEG in LightRoom, no processing.
I haven't used the Samsung on JPEG mode, but shooting RAW at its native ISO200 then simply exporting to JPEG in LightRoom is giving me results I'm very happy with. I really don't like post processing, so cameras like the K10D and GX-1S where you can shoot RAW then just export as JPEG with no faffing about make them even more appealing to me. And like so many say, those CCD sensors do have a special magic. Especially with a Takumar!