BlackBerry Messenger 126.96.36.199 has already been released to the masses through BlackBerry App World, however those who have a BlackBerry Beta Zone account can update to version 188.8.131.52. This update is of a hotfix to address a few issues that users have been encountering. The two main issues this update fixes are:
The beta program for BBM 6.1 is still ongoing so if you do encounter any issues be sure to report them via BlackBerry Beta Zone. If you haven't already signed up to Beta Zone, sign up today at www.blackberry.com/beta.