I have a DIR-655 router, firmware version 1.05.
I have had this router for close to 2 years now and had no problems with it so far. My brother plays the Xbox 360 over wireless and just a couple days ago he said we had a small brown out in our area and ever since then the Xbox 360 has been unable to connect to the network.
When I try to test the Xbox Live connection it says "Can't detect your network hardware". When I look at the wireless adapter on the Xbox it has a steady red light.