IRC

Channel

##udacity-cs255 at Freenode (irc.freenode.net)

This an unofficial channel, don't forget double hash (##)

What is IRC?

Internet Relay Chat (IRC) is a protocol for real-time Internet text messaging (chat) or synchronous conferencing. It is mainly designed for group communication in discussion forums, called channels, but also allows one-to-one communication via private message as well as chat and data transfer, including file sharing.

From wikipedia

Give it a whirl!

Try the web gateway.

IRC Client

Try one of the IRC clients for a better experience.