Just yesterday Foursquare was updated to version 1.5. Today version 1.5.5 is out and includes BlackBerry Storm support.
Foursquare for BlackBery 1.5.5 features:
- Touch-screen support for Blackberry Storm users
- Much better, faster and more accurate location lookups
- Improved performance (both speed and battery life)
- New users can now sign up from the phone
- Ability to see nearby tips and tip details
- Ability to add friends
- Ability to find friends
Download Foursquare for BlackBerry: http://foursquare.com/blackberry/beta