That is an Atari 2600.
I should really dig it out again... Last year I decided to grab a bit of nostalgia off of eBay. Now I'm toying with the idea of getting a 5200 or a 7800. Anybody got preferences?
On the pictures, I think that's an artifact from the camera. Jen commented on that last night. When I looked at the wall, the pictures are straight, so I'm not sure what happened. If you look at the last picture, you can see that the top of the right M50 is more visible than the left. I must have moved when I was taking the picture or something.
Thanks for the compliments on the entertainment center. I'll try to grab a few more pics of it with less junk (cds, Netflix, etc.) all over it.