Faye: Simple pub/sub messaging for the web
http://faye.jcoglan.com/

Faye: publish-subscribe messaging system based on the Bayeux protocol - http://bit.ly/dmqXJl – Smashing Magazine (smashingmag) http://twitter.com/smashingmag/statuses/16611922553

Faye is an easy-to-use publish-subscribe messaging system based on the Bayeux protocol. It provides message servers for Node.js and Rack, and clients for use in Node and Ruby programs and in the browser.