Intel Macs

I've seen a number of comments related to the new Intel-based Macs showcased at MacWorld. Most intruiging to me is notion of being able to write optimized code that runs on Macs and Windows, especially SSE, SSE2 and beyond (a subject to which I'm going to be devoting more thought). My hat goes off to Apple for a lot of good developer documentation in this area (1, 2, 3, etc.).