Here is a 100% crop of the focus point of that image I took which was posted earlier here.
I think this is pretty good for iso 3200, 100% crop,... and it was a hand held shot taken at 1/15, so the SR is pretty good as well, and it was quite dark as the aperture was f2.
Having said that, I usually don't use iso3200. Like has been mentioned nothing compares to IQ at iso100 and iso200. For objects like this iso3200 is ok, but for faces, or even animals and birds iso 3200 with the K-7 changes the skin texture too much. I will say I am very pleased with the K-7 upto iso 1600, where if the image is taken with high quality glass, one can feel an image, and not just see it. But, I also hate to carry around a tripod, so knowing iso 3200 is available is nice to know. I never use iso 6400, I'll rather underexpose at iso 3200 and pull 1-stop in PP.
Somewhere here a link was given for some of my early attempts at PP high iso images of some museum airplane shots. That involved quite a bit of PP, including masking differnet area, and quite complicted curves and masking, and dodging etc.
The shot above was opened in Photoshop CS2 adobe raw. Under the 'detail' tab, I reduced noise (100% chroma and significant luma noise) and increased sharpness, all at 100% view (This is the first time I did it this way...I usually open in LR and the send to CS2 as a jpeg). Opened in CS2 as a jpeg (I need to remember to change this to a 16 bit Tiff, as it would be even better) and used noiseware plug-in (well worth the $50) and ran noiseware at it's preset 'weak noise' preset. So, no fancy slider usese here. No masking at all. Even the image was taken with no exposure compensation (no ETTR).