I think I'm going to try an additional case fan. I notice that the fan on the power supply blows out quite a bit of heat. I uninstalled SETI. It was yaking forever to run although the temp stayed at 50 with 100% cpu usage. Just for kicks, I'm going to load it again, and run it with the case open and see what the temp climbs to.
As far as over-clocking goes, I think I'd like to try it, although, first I want to get more air flowing through the case.
What do you think of something like this? Seems easy to install, relativaly cheap and moves a lot of air with a fairly low Db rating.