My XBox Won't Get On XBox Live!
Hopefully the title of this entry will get through on Google and help a few people. Having troubles getting your XBox Live account to work through your router (wireless or not)? Does it say that you have to install an update to continue using XBox Live, but says the server is not responding? Disable UPnP and watch it work like magic.
Thanks to my cousin Adam for the tip! :)