It has been a while the BBM beta app on Windows Phone was updated.
It almost looked like the BBM Dev team had forgotten about us, but that's not the case.
A new update was rolled out to those enrolled in the BBM beta program for Windows Phone.
The update pushes the BBM beta app to v2.1 and it introduces Channels!
Yes, channels is now available for BBM (beta) users...
Once this build is tested by beta testers and deemed fit for public use then it will be released to the public.
It could take a couple weeks to a month depending on how stable it is.