by Marc Hedlund
Related link: http://www.gotdotnet.com/terrarium/
"Terrarium is a multiplayer ecosystem game developed using the .NET Framework. Developers can create their own creatures and add them into the game on their own client machine. Teleporters on each client transfer the creatures between clients in the Terrarium peer-to-peer network."
Good Old Technosphere...
Interesting -- while the distributed approach is obviously new, this brought to mind TechnoSphere (http://www.technosphere.org.uk); they've been running a similar model world (in which user-created creatures compete for resources) for a few years...hmmm...appears to still be up.