I'm currently running the Foursquare app on my BlackBerry 10 Dev Alpha device and it's very quick. Nothing like we have seen before on a BlackBerry. Location finding is very fast, as well as the new UI is very smooth. Of course the app is integrated with Facebook, Twitter, and BBM. So it's easy to share your Foursquare status with all your friends.
Have a look at the screenshots below and let us know if you have any questions in the comments below!