I am interested from an integration stand point. We use VOIP in our business. I would like the option to answer the phone from my BB on the go, but not forward etc, as I can't always answer. I believe there are other uses of it for me as well, but I haven't looked at it too hard as it doesn't seem to be much of an option for us yet.
If the iphone has and is using it well, RIM better get on board.