Return of the Triad is a (G)ZDoom TC based on ROTT. It contains 2 single maps and 5 MULTIPLAYER(!) maps:
http://www.doomworld.com/vb/wads-mod...demo-released/
If anyone's interested. I'm organising a game for tonight at 10pm GMT over at the ROTT forum. Either myself or jbailey will be hosting.
It looks really easy to setup multiplayer games. This could be what we've been waiting for!