In addition to the iMac’s new paint job and some minor updates to iLife and iWork—Numbers notwithstanding—, Apple quietly updated several items in its online store, including the AirPort Extreme Base Station. The extreme router now has Gigabit Ethernet WAN and LAN ports. That means it’s faster (even though the Internet connection coming into your house is nowhere near as fast as GE).
Apple also put its new keyboard (you know, the one that ships with the new iMac!) on there. Oh, and the Mighty Mouse now has a slightly different paint job. No one uses the Mighty Mouse, or enjoys using it, so who cares.