Foursquare App for BlackBerry OS Gets updated

The Foursquare app for BlackBerry got a modest upgrade today. No, its not going to include Radar, but the logo in the top-left now launches into a notification stream. The notification list will include comments on your check-ins, when friends do one of your tips, both you and a friend have an identical place on your to-do list, when you're ousted as mayor, and a bunch of other activity on the location-based social network.

Foursquare is basically a location-sharing social network with a lot of game elements piled on. You get points every time you check in to a place, which vary depending on how long its been since you have checked in last, who you are checking in with, and lots of other variables. Those points put you on a leaderboard among your other friends, so you can compete to be the top dog.