Hi, I have a Blackberry but I'm not familiar with this function...any chance you could give a brief explanation on how it works? Thanks.
Is your bb given by your company? If so they might lock out that functionality.
Nevertheless you can try to go to the BB app store (should be an icon in your BB if you have the later version blackberries), then search for blackberry messenger
go download it and try it out.
Basically its just like any IM client, but its constant on all the time. And its FREE.
I admit it if your friends dont have BB then this app is not all that useful (need the network effect). But in the country where I am from almost EVERYONE has bb now. So BBM is a godsend. I save a lot of money by just using BBM instead of texting or just calling them out right.