Here is a game I made for this latest ludumdare.
http://www.ludumdare.com/compo/ludum-da ... &uid=15043
The theme was beneath the surface, so I made that old qbasic gorillas game, but half underwater.
It is using the new Multiplayer engine. It wasn't a walk in the park to make it work, but it was WAY easier than any alternative I ever used.
Give it a banana/shot!