BBM beta for Android has faster, more responsive UI and several new features
One of the new features in the beta allows those with an Android powered BlackBerry handset to quickly import contacts from BlackBerry 10. To do this, go to the Me tab and then to Contacts. There, you will paste your exported BB10 contacts list which will be imported to your Android contacts.
As for the remaining changes and additions to the beta, you can check out the changelist by looking at the screenshot that we've embedded to this story. No need to thank us, it's just what we do.
To sign up for the BBM beta for Android app, make sure that you have the regular version installed on your phone. Then, simply click on the sourcelink directly below and follow the instructions.
source: BBMbeta (Android)