It seems that if you didn't sign up in advance for it at the Blackberry website you will be put on a waiting list to "hold your spot in line" to start using it.
http://news.cnet.com/8301-1035_3-57608483-94/blackberry-bbm-finally-hits-ios-android-but-theres-a-wait-list/
Blackberry Messenger was finally released for android today. I just downloaded it. What are everyone's thoughts on this? Were you looking forward to it? Will you use it? Did it take too long? Any other questions?
I personally will take a wait and see approach with it and see if it "catches on".