At his keynote address today at WWDC2005, Steve Jobs announced that Apple is indeed making a switch to Intel processors.  What this change means to the current Mac community and the development of the Mac platform remains to be seen, but Apple will have some tough times ahead switching to a new architecture.  Here's a blurb from Betanews:

The transition will not happen overnight, Jobs explained, saying it will take two years comprised of two major challenges. The first will be making Mac OS X work on Intel-based x86 processors, but Jobs wowed WWDC attendees by announcing all of the demos he had performed were actually on an Intel machine.

Apple has been compiling Mac OS X on x86 processors for 5 years Jobs said, adding that by this time next year, Apple hopes to ship the first Macs with Intel chips.