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