http://www.poisonville.com/
Poisonville, upon having attended GDC 2010, has entered the crucial stage of closed beta. By all means, go to their website and sign up! This is no doubt one of the most prestigious projects ever to be powered by the jMonkeyEngine and we hope they will go far!
Check out this slick showcase video:
http://www.youtube.com/watch?v=VlmJ1JUbMMI
And a series of GDC pictures:
Yahoo