Check this out.
Overclocking P4 to 5.25GHz
Sorry If we aren't allowed to post this kind of thing.
Thats pretty amazing. I believe tomshardware did something like this..Although i don't think 5.2 is the world record, i think someone got up over 6
thats pretty sweet .... liquid nitrogen ...love it
But I think this is a lot cooler (literally! ).