Mines 54degC (XP3200) with an Aero7 fan.
My mates downstairs is one of the new dual core Athlon 64s, and his temp is sat at minus 9!!!

. He's got a vapochill cooling case though (its like a freezer, sounds like one too so quiet, just a little hum!)
The evaporator temp is -54 it says
Top stuff those Vapour Cycle cooling things, will get one myself when I change to dual core later this year