I'd hoped to measure the temperature of my iBook CPU -- esp. since the fan seems to have become stuck, immobile, dead, defunct, etc.
Unfortunately ThermographX doesn't support the iBook. I couldn't find any OS X utility that does. However, the old Thermograph does! Unfortunately it requires booting into classic, and there's nothing I can run in classic that stresses my system at all. So my CPU in classic reads out at a happy 20-25 deg C.