A modder at Duck and Cover has managed to create a multiplayer mod for Fallout 3. While still in the early stages of testing and implementation, it promises to dramatically increase the replay value of Fallout 3. Check it out:

Link: http://www.duckandcover.cx/forums/viewtopic.php?t=23779

Thats awesome! Kudos to that guy!

The people here sorta already know about it though.. I told them. I appreciate the topic