This post is not really about windows networking. It is rather about a fun way to spend time ;-).
Pocket UFO is a remake of a classic turn based strategy X-COM Enemy Unknown (UFO Defense). It is available for Pocket PC and Windows Mobile.
This game has pretty decent graphics (I used images available from the official site):
The gameplay is classic and it is a lot of fun. The game runs flawlessly on my iPAQ 4155.
Pocket UFO is available for download free of charge!
So if you like interesting strategic games and you have a PDA or communicator with Windows installed on it make sure you check out this game.
Download page: Pocket UFO with MS Windows Installer