UPnP is set, should handle most of the XBox for ya but I saw two things:
#1 - DNS 1 and 2 - uh, 0.0.0.0? Shouldn't those be set to your ISP's DNS settings?
#2 - You have your SSID all IN CAPS on the 655, I've had issues where if you don't match it perfectly in case and lettering, problem. And you have a space between IDENTITY and NET, I've noticed that'll cause all kinds of hell too! Either take it out or use an underline _ either on the 655 or more than likely on the 360.
Side note - It's a large update, you can get it off XBox.com and use like IMGBURN to make the ISO into a CD and do the update from there so that it doesn't have a long period updating while you debug this. I get it anyways most of the time as a backup since it's just on a CD. Boot to the CD you make, update, then fix this other stuff quickly and see if you're on XBL