My sister and my friends are pestering me to go buy a BB so they can BBM me. I think they already got the market cornered as seller of the ultimate communication machine. I which Nokia would come up with a system like BBm, they could embed it in their new phone model and release it a standalone service for their older phones. Thanks to the sheer size of their market share I believe it would be pretty popular though I don't see them investing in the infrastructure to support such an offering anytime soon.