After some more investigation, it appears I can't overclock anymore. 600 works, but 800 and up 3G tanks. Everything else works great up to 1.2 GHz. That's just the fastest I've tried, don't know if 1250 or 1300 work, chickened out. But temps were good, no force closes except for the tardis lwp, etc. I'll have to play some more over the weekend when I have more time and see if I can find a kernel it's happier with.