Recently Microsoft launched their latest unified messaging system – the successor of Office Communicator 2007, it features full telephony via SIP and instant messaging via Jabber/XMPP, making it capable of communicating/federating with a large number of existing open systems. The really dishy part? It comes in at around a third the price of the traditional enterprise PBX.
I had been working on just such a thing myself a few months back and it’s good to see I was on the right track with where the Industry is going. Death to the telephone!