Since the BlackBerry has grown up to be more than just a glorified pager I have always been interested in what else people use it for. I am talking beyond phone, email, and basic PIM management. By secondary features I mean the ones that are not the bread and butter of the BlackBerry. I know I use it daily to catch up on the latest news through my RSS reader.
So what do you think is the BlackBerrys most useful secondary feature?