And did we mention it's a white Nexus S?
There's been no official word from Samsung or Google, but the Nexus S with GSM 850/1900 radio bands has shown up for sale at Negri Electronics' online store. It's carrying a model number of i9020T, and is available in black or white for $598.50. What we don't know is if this is the Nexus S with an AT&T specific radio, or an unlocked import of the Nexus S from abroad. I'm sure as people order these and get them in-hand, we'll know a bit more.
In either case, it's a Nexus S that will work with AT&T's 3G, and more than a few of you guys have been waiting for one of these. [Negri Electronics via Android Central forums] Thanks, Abraham, for the tip!