Right now it's BlackBerry only, although we are working on a "generic" version. The problem with generic phones is that they all implement bluetooth a little bit differently so it becomes a pain in the butt to develop for, so it's going to take a little time.
We are looking for suggestions for the next version and would greatly welcome any new beta testers that would be interested. Just make sure you send me a PM with your contact info so I don't forget about you