Holy crap that was a fast reply.
No, luckily that aint the problem. There's a special offer with Sky Broadband where you get a free wireless router with the MAX connection, but it isnt enabled around here yet, and they keep delaying and delaying. They're saying 3 months atm, but I guess I'll be lucky if I get Live around my birthday.
Before you say, I cant just use an Ethernet cable, because the Xbox is downstairs and the current (non-wireless) router we have is upstairs, in my brothers room. Doing so would require a 20m cable, and I cant be arsed wasting money on a long bloody wire, and nor can I be arsed buying a wireless router now, only to get another for free in 3 months time.
[edit-off to play bf2142, ttyl]