Really happy to see socket.io working for you guys. As someone mentioned, not only should it enable WebSocket for Firefox, but also IE6-8, iPad, iPhone, Android, WebOS, Safari 3, and others (even if connected through cross-domain)

Some other projects from the knockout leveraging it:

http://swarmation.com

http://maprejuice.com/

http://demiox-boiko.no.de/

http://piston-hurricane.no.de/

http://nodelicious.no.de/

http://virtual-design.no.de/

http://inflatable-chum.no.de/

http://fragnut.me/

http://braintree.no.de/

http://nodty.no.de/

http://tweetquestgame.com

http://speedo.no.de/

http://piratetron.com/

http://error-500.no.de