I guess this was inevitable and with all the tips its worth mentioning. JT over @N4BB scored a leaked version of the BBM for Android Gingerbread devices (OS 2.3.3+) that seems to work on all devices even if they are not whitelisted. I am not sure why BlackBerry did not put that in after the last leaks but my guess is they will eventually just block this version. Either way you cant try it out for fun by installing this APK.
Let us know what you think! Better yet install it on your PlayBook and let us know if it works!