"Welcome to JWChat at jwchat.org A web based Jabber/XMPP client"

"To communicate with Twitter we can use this cool Ruby Twitter API. Unfortunately ... So we need to interface with their Jabber Service. Jabber: name for IM using XMPP protocol. Luckily, there is a Ruby library called XMPP4R which does most of the XMPP work for us. This blog post provides some simple examples and this German wiki entry provides sample code how to use callbacks (very important for a bot)."