I have a 2008/2009 24" iMac:
Model Name: iMac
Model Identifier: iMac8,1
Processor Name: Intel Core 2 Duo
Processor Speed: 3.06 GHz
Memory: 4 GB
Video: NVIDIA GeForce 8800 GS, 512 MB
Now, to date, this thing hasn't skipped a beat and I've had no problems playing WoW... but... as of this morning, World of Warcraft has been crashing and requiring me to restart the machine.
Typically, I login... then after a couple of minutes or as soon as I zone into an instance it will freeze, the mouse will become inverse (up becomes down; left becomes right and so forth) and I'm unable to do anything... not even access my desktop or anything in OSX.
Thus far I have formatted, installed World of Warcraft afresh... and scanned for the Flashback Trojan people are talking about, and nothing... still happening.