During the keynote of BlackBerry Jam Americas, the Foursquare developer was on hand to demo the Foursquare app for BlackBerry 10. It apparently only took three days for two programmers to port the Android Foursquare app to BlackBerry 10.

The Foursquare app even has BBM integration, as shown in the image above. Foursquare said they were very enthusiastic about bringing the app to BlackBerry 10 after they saw the immense users on BlackBerry using the service.

If you missed seeing it on the live stream of the keynote, not to worry as we will soon post our own version of the demo.