Chat means one thing to me, XMPP. I would encourage you to look into Voxeo IMified at http://imified.com . I really don’t think that people appreciate the significance of XMPP. XMPP is all about natural language communication. I feel strongly that in the future more machines will be using it than people. I believe that XMPP will be the primary means of machine to machine communication using natural language. I also believe that XMPP will be the way that people communicate with AIs; however, surprisingly, there is no consumer IM – Voice bridge currently available. That will be a revolutionary app, a simple bidirectional instant message to voice app, with universal XMPP plug and play on the backend – not only for hands-free IM, but also to actually speak with AIs.