Looks like the Xbox 360 specs are roaming wild on the web, should you choose to believe them. It's not messing around, either, with "all games supported at 16:9, 720p and 1080i, anti-alias[ed]," wireless controllers, 3 CPU cores running at 3.2GHz each, an astounding half-a-gig of RAM, and "Wi-Fi ready" networking. Perhaps most interesting are the three USB 2.0 ports, which makes it sound like they'll be regular ports, not modified ones as like the original. If these specs are legit, it's going to be a very powerful bit of hardware. I know I shouldn't be surprised, but every new console generation I get all giddy again.
Gaming Horizon also has purported specs on Xbox Live, if you are so weak as to need human camaraderie.