Texting for sure, more than talking sadly. Or if I'm not texting msn or twitter. Don't browse on it as much as its a pain to use (unless the site is wap).
Posted from my CrackBerry at wapforums.crackberry.com
Text, email, web browsing, brickbreaker, google talk.. come to think of it, i've never used BBM before, don't know anyone who has a BB! They don't know what they're missing!
Email/texting (God bless the unlimited data plan), web browsing (keeping up with all things BlackBerry), Facebook, the occassional brick breaker, making calls