It's a big round number and all, but in the world of mobile messaging BBM remains one of the smaller players.
BBM for Windows Phone is a great social networking option for BlackBerry fans, but competing chat apps offer more functionality, and have a far broader audience.
Pricing not available
The latest version of BlackBerry Messenger, announced at Mobile World Congress, adds more features aimed at personalization and privacy.
The Beta for BlackBerry Messenger for Windows Phone offers much of the quintessential BBM experience for Windows Phone fans.
The beta of version 1 is now up on the Windows Phone store, while BlackBerry is already working on version 2.
BlackBerry's president says to expect a more native app experience for BlackBerry Messenger on iOS and Android.
Windows Phone users who signed up for the BBM beta tester program can now download and install the app.
Windows Phone users who want to take BlackBerry Messenger for a spin will have to cool their heels a bit.
Blackberry's new encrypted BBM messaging software is a reflection of its renewed focus on business customers.
In the works are updates for two popular BlackBerry products, Secure Work Space corporate email and the BBM messaging program for Android and iOS.