Hmm. Could be a bunch of things. So, you can get into the game, but you get kicked off...is the time this takes usually consistent? Also, do you run any programs that are constantly connected--Trillian, IRC, etc? If so, do they also need to reconnect when this happens?

As for IPs, if the DHCP renew isn't going through and your ip changes, yes, that would do it. Would kill any open TCP connection, really. If that's the case, a static IP would be one way to fix it (Also, static IPs > dynamic if you ask me). OTOH if you're certain your connection is solid, this cannot be it. On a third hand, Speed doesn't necessarily mean stability.

To check on that, open up a cmd prompt and type "ipconfig /all" (assuming windows here, use "ifconfig" if you happen to use *nix). You should see a time at which the DHCP lease expires. Check on it now and then--If you get more than halfway from the time it was issued to the time it expires, there's a problem.

And lastly...If you have some sort of firewall that makes "smart" decisions without your input and is mostly out of sight...kill it.