Was the xbox live service down yesterday for signing up?
I spent 2 hours from 4pm till 6pm manually setting the IP addresses on the network and ensuring that the ports were all mapped and allowing the data through correctly, yet everytime I tried to recover my gamer tag I already had setup it just kept saying that the service was temporarily unavailable.
Anyway, I've got a plan to make it wireless involving an old ADSL wireless router switched to just act a as wireless access point and then making this jump on the wireless network I already have setup
Save's me paying 50 quid for the MS wireless adapter