BlackBerry Messenger for Mobile

Chatters of a feather flock together. That's the impetus behind BlackBerry Messenger, RIM's instant messenger for BlackBerry users that skips over SMS fees and goes straight to your pal's IM in-box. Version 5 takes a huge leap forward with a ton of new features: tiny thumbnail images of your contact so you don't forget who you're talking to, photo-sharing for files up to 6MB, and the ability to chat with groups of friends in addition to individuals.