Adding some temps is a good idea, readings from Motherboard Monitor 5.04:
Asus CUSL2-C, PIII 700e@1002, Alpha PAL 6035 CPU temp 44C under full load, 31C idle
Abit BH6, PIII 700e@868 GORB (who knows) MBM5 says 37C but I don't trust the BH6
Abit BX6R2, cel300a@464 Globalwin dual fan 37C (I think these are mobo temp on the BX boards)
All three running seti@home 24/7 using Team Anandtech proxy to get work units during seti@home outages. All three also being internet browsing stations / work stations / game boxes.