In Foursquare, the latest social-networking-craze, users "check-in" to the various places they frequent, and attempt to gain more check-ins than friends
and other Foursquare users to secure badges and "Mayor" titles for favorite establishments. Since the service is employed mostly on the go, there's no
better way to get in on the fun than with the new BlackBerry Foursquare app. It's still in beta, and it's far from perfect. But the app works well-enough for
me to recommend it here. (Warning: Stealing away my Mayor titles is grounds for fisticuffs in my book!)
Free from Foursquare.com.
Get Your BlackBerry Black Belt with CIO.com's BlackBerry Bible: Everything You Need to
Know About Your RIM Smartphone