Apple might not have some glitzy marketing name for their solution, but I think it's a solution that's been around much longer than Centrino or anything else that is integrated: Airport.
If you look at it, Centrino was basically the sum of the CPU, miniPCI wiFi card, and chipset. Not really much different from what Apple has been doing, but as usual the Wintel's marketing spin always tends to claim they were their first, with ignorant people following along.
