A rather under-publicized feature of the new Intel Macs is that their wireless cards will be 802.11a capable. 802.11a never really became a common standard for consumer networking hardware, but some corporations adopted the standard.
The good news is that owners of Intel models will be able to utilize that standard which will also be supported as a fallback standard under 802.11n. With some vendors shipping A+G base stations, using an 802.11a network in a crowded may help ease interference issues and boost speed.