Mario Gonzalez wrote in with a game his team have built using Node and WebSockets: Ogilvy & Mather Holiday Snowball Fight. It’s a multiplayer game that uses a lot of interesting libraries, like CAAT and BiSON. The developers even say they based the multiplayer design on Valve’s Source Multiplayer Networking papers.
>>> The game-engine, collision and logic run on the server in JavaScript running on Node.js. The clients are simply rendering information sent from the server, and sending off keyboard input.