Seen on xlr8yourmac, FiringSquad has posted an article about NVIDIA's upcoming nForce chipset for PC's
Of note is this quote in the article:
Future platforms
Since it's based on the GeForce2 MX core, nForce's integrated graphics fully supports Apple's big endian byte ordering scheme. When we questioned NVIDIA if it was possible we could see nForce in the Mac, NVIDIA answered in the affirmative. In fact, the mobile space is another area NVIDIA would possibly explore in the future.