Eyes Only wrote::whistling: Shows how little is known about the actual game. A Gamespy account is only used for player stat tracking and social features. Games that use the Gamespy SDK rely on the master server for client-server connections, and more importantly NAT negotiation. Without the lobby and natneg functions of the master server, online functions of the game are broken.
Edit: Darn, bryant you were #2 on the big 3 list. Anyone that knows C++ can help :3
I think you should still be able to direct connect to servers with Xfire and the like.
You just lose the built in server browser.
You also lose the CD key functionality, so you will have to switch to IP banning.