Hiya, it started with BC2 Vietname which I haven't been able to play for a few days. It would disconnent as soon as i started up and then not allow me to reconnect through the guide button. Now it's happening to other games as well.
Weirdly, when i start up, friends avatars and the game they're playing either take forever to load or don't load at all biut there's nothing wrong with the wireless network.
Ran the network connection test and it appeared as a problem with XBL itself. EDIT, reset the router, reran test and live was fine. Started up Mass Effect 2 and disconnected straight away. Still can't see friend's avatars or go to the game marketplace.