Nothing playable yet, but Steenberg has released a test client that will (via the menu screen) show how well his impressionistic multiplayer game will run on your PC. It's kind of tantalising and frustrating to download this and not be able to log in, but by running it you'll be helping Steenberg out by gauging interest and general PC specs for his potential audience. Also: pretty.
Steenberg says that the beta is "close" perhaps "just a matter of days". Woo.