AT&T Samsung Focus receiving OS 7740 update?

We just received word from a reader that his AT&T Focus v1.3 managed to get the coveted 7740 OS update--an odd occurrence as we're not expecting US devices/carriers to roll this out.
Couple of caveats here: Justin's Focus was a developer version that he won via a Windows Phone contest and we've interacted with him before on this site, so we're confident that this is legit. However, when we plugged our Focus in to check Zune, we're met with the "You're on the latest..." screen with us stuck at 7720.
What to make of this? Perhaps some developer phones had special firmware that allows them to get the latest update--makes sense especially for developers. On the other hand, maybe AT&T is planning on some updates? So, anyone else with a Focus seeing this update coming through--if so, let us know in comments.