Well I'll tell ya the truth about what I know for sure.

I got a virus/worm/trojan but removed it with AVG. My connection was perfectly fine until I got infected. After I removed it, I couldn't connect to any game servers, limewire, control panels or that site. The only I can pretty much connect to is MSN. And it says I am blocked by a firewall on limewire, but I think I don't have a firewall. This is the first time I've ever had a problem with connecting to limewire.