Hey Gus!
I also expect to upgrade to the K20D. I really like my K100D, but there are features that I wished it had.
Pentaprism viewfinder, on body controls for metering, ISO etc. At the time that i bought the K100D, I did not know what I wanted in a DSLR body. After using the K100D for a while, I think i know have a grasp on what I need.
I might wait untill we see what pentax unveiles at photokina 2008 though. I really expect something big.
But then, I'm too cheap to shell out the cash for what I expect to see...
Back to the K20D, unless it turns out to have a critical flaw...I really look forward to using one.
Now if I could only address my adiction to buying lenses off ebay...I might be just that closer to a new camera body!
Eric.