The Sun Game Server is the first product released from Project Darkstar. It is a online gaming engine that scales massivly and comes with a rich set of client APIs. You can get the EA bits here: https://games.dev.java.net/.
Update: The final web site for Darkstar is going to be http://www.projectdarkstar.com – Thanks to Jeff Kesselman for pointing this out.
Tags: Online Gaming, Darkstar
Thats actually a temporary location.
The permenant url is http://www.projectdarkstar.com