I did this mod a couple of years ago with some success. The additional heat/voltage eventually fried the logic board. I was able to boost it to 1.3GHz for short spans but it ran reliably at 1.13GHz. The voltage mod is particularly hairy.

Check out my old thread for a play-by-play:

Unforutnately, it looks like the images got lost during MacMod's forum-engine transition.

Edited by (11/16/06 11:43 AM)