Windows Live Messenger
A little of the Exchange track, but yesterday Microsoft released Windows Live Messenger, you can get it from here: http://get.live.com/messenger/overview
As well as all the usual features, you can now do the following:
Welcome to Windows Live™ Messenger
This is the same Messenger you know and love, only better.
It has everything you're used to—your contact list, emoticons, and instant access to your friends via text, voice, and video—plus some cool new stuff, including:
