Facebook React version of Group Chat

I needed to teach myself Facebook React really quick, so I decided to re-write the Group Chat application over the weekend using React. I mainly used this tutorial:

http://facebook.github.io/react/blog/2013/11/05/thinking-in-react.html

To use the chat application just run the server and point your browser to localhost:3000
Type '/register yournickname' to register the nickname 'yournickname'
The list of participants is displayed on the right.
Once you register a nickname you will be allowed to chat.