At the moment I'm currently converting an avi to mpeg with iSquint. I only have the conversion program going and Safari. Using iSlayer to monitor temps, I'm currently hovering right under 80C in the 76-78 range. CPU is currently at 70% constant usage. I imagine when I Handbrake a DVD, temperatures would get even higher (didn't have the temp software installed when I was Handbrake'ing stuff). I know MBP's get hot, and the heat isn't bothering me. I'm just wondering, when should I start worrying about the internals when it gets too hot? How hot is to hot for the Macbook Pro?