Instant (b2b) Messaging

I use AOL instant messaging to stay available to my sales guys. To the ones I use it with, it is indespensible. But it is like pulling teeth to get some others to use it. It has to be the easiest, cheapest b2b application that shows immediate benefits.

BTW, my new favorite emoticon is: @@ (eyes rolling). True that only shows I'm using it to gossip sometimes, but isn't that part of b2b communications?