I'm using it right now on ATTBI. It works so much better than my two previously leased RCA DCM 235s and my short-lived Outpost D-Link DCM200. The others all disconnected intermittently, but the Motorola has solved the problem.
I actually picked it up at Best Buy a week before I read about the rebate here (thanks guys). I took it back in to BB and returned/re-bought it and the rebate printed out at the register. Great deal!