Performance enhancements and bug fixes also included in version 18.104.22.168
Just in case your device wasn't on the list of supported phones or tablets at launch, BBM has just been updated to support even more. Unfortunately the changelog doesn't indicate a complete list of supported devices nor does it say which were added in this round, but we're never going to turn down an update for wider support on a popular app.
The update also includes "bug fixes and performance enhancements," naturally, but again no specifics were given. If you were unable to install BBM before, hit the Play Store link above and see if your devices are supported now.