I heard through a post on Crackberry that I could get the BBM 6 BETA from the Blackberry Beta Zone. I have had an account for a while, but when I tried to add the program, it was not available. Here is a screenshot of what I have available:
Just google BBM 6 download on your BlackBerry, you will find many download links, after installation , it will ask you for a keycode, just use the same keycode for BBM 5 Beta, they are inter compatible