There are a number of posts that talk about CPU temperature. Is there a utility built in to Mac OSX that I can use to determine the current temperature of the CPU?
I personally use iStat nano for my system monitoring needs. Here it is showing the temps it can read on my iMac:
*) user-configurable, e.g. which temp sensor's readings are displayed
I use smcFanControl which can tell the internal temp of your computer as well control the speed of the fan (in case you need to increase/decrease the speed manually).