Centerpoint has map updates of areas that have no electricity(red) and have been restored(green). Unfortunately, it is in PDF format. If you are checking from your blackberry or other mobile device, you are out of luck. Centerpoint Outage and Restoration Map
It's already in this thread that's stickied : http://bbs.clutchfans.net/showthread.php?t=153971 Any informative links should probably go in that thread so people don't have to hunt in multiple threads.