Today’s tip is JavaScript Jabber episode 122, Socket.IO with Guillermo Rauch, length 48:28.
Socket.IO enables real-time bidirectional event-based communication. Guillermo talk about what sockets are and what you can do with Socket.IO. He also talks about the future version 2.0.
There was also a NodeUp episode on Socket.IO with Guillermo a while back if you want to hear more.