We are working on this long awaited mod for Return to Castle Wolfenstein (2001). You'll be able to play the whole campaign + new maps with your friends!
Server Browser for Return to Castle Wolfenstein cooperative modification.
For convenience, I wrote a small program for monitoring coop servers. The program updates the information automatically after a while, but for accuracy at this particular moment in time, an additional Refresh button is screwed. Enjoy :)
Finally