BlackBerry have roll out an update to BlackBerry Channels.

Here’s what’s new in this release:

Spread the word out about BBM on iPhone and Android to your friends and family!
When you upgrade an automatic personal message (BBM status) will alert your contacts about Multi-Platform BBM availability and how they can download!
Easily spread the word across other mediums such as Twitter and Facebook with a new button that allows you to “Share the News”.
Ability to Block Channel Subscribers: you will now be able to block individuals from commenting and reposting in your channel right from the channel comments.
OS 10.2 Only: Black Theme: you spoke and we listened! You now have the ability to set a light or dark theme for BBM!

To get BBM Channel first download Beta Zone from BlackBerry World.