Was That Just a Gamma Ray Burst in Andromeda?! (Updated: No, but still cool.)

The Swift Gamma-Ray Burst Mission just saw something bright in the Andromeda Galaxy. It was either a Gamma-Ray Burst or an Ultraluminous X-Ray Object, but either way it will be the closest event we've ever observed. ...unless it's just a known X-ray object, a programming bug, and a thunderstorm..