Android 1.5 already hitting T-Mobile G1s?

We'd kinda gotten used to the cold, hard reality of being teased with the promise of a Cupcake build on our retail G1s out in some distant, nondeterministic future that we may or may not be a part of -- but all of a sudden, it looks like we might've vaulted right past Cupcake. We've now received multiple tips this evening suggesting that T-Mobile may have started distributing Android 1.5 as an over-the-air update to G1 owners, which would bring customizable widgets, messaging enhancements, virtual keyboards, and UI tweaks (among many other goodies) to an eager public. Anyone out there seeing this?

[Thanks to everyone who sent this in]

P.S. - No, your eyes aren't deceiving you: these are little green pastries baked by T-Mobile. "We heard people wanted cupcakes," one representative told us.