Non-loaded stable temp is about 41-43C (CPU), or 37-39 (socket). Under 100% load for some hours (I run Folding@home), the CPU shoots up to a maximum of 51C, or about 46C for the socket. I'm running the Zalman, but at the lowest speed or about 1400RPM. All this on a stock 2500+.
I noticed a considerable rise in temps after I installed the 9800 Pro. This thing is hot and contributes to the overall case temps. I also don't have very good ventillation, despite running two case fans (admittedly at about half their native voltage).