This is ridicoulos. I've tried my halls of residence, Uni labs, the libary my parent's half a dozen friends. every time I'm notified on http://www.swcombine.com/join/joingame2.php that I'm using a proxy. I take it this is some kind of check and dynamic update. Does this mean I can't join since I don't seem to have access to a non-proxy connection. Isn't just about every broandband connection via a proxy?
Actually, no, but schools, workplaces, and larger ISPs (primarily AOL, BTI, and NTL) do display as proxies. However, in manually checking join requests admins tend to approve those unless there are particularly suspicious ones. If you are receiving an automatic error message when you try to submit the form (rather than the manually-checked e-mail notification), can you please post the exact error message you are receiving?