if the rumors were true (i've never seen info on the net to prove it) some college student in japan OC'ed his P4 to over 7 Ghz using liquid nitrogen for cooling.
going off of Borat's link
ATI Radeon 512MB HM PCI Express Graphics Card FREE UPGRADE TO Intel Extreme Graphics Media Accelerator 3000
UH... wouldn't that be a down grade??? Unless intel started to maked PCI-E cards i wouldn't do that...