I have Facebook messenger on my blackberry and I want it on my playbook too. So I went to fb.me/msgr to download the messenger but it doesnt work. I thought if it works on blackberry it will work on playbook too, but I guess I'm wrong.
The Playbook and Blackberry Handsets currently run different Operating Systems hence why the Blackberry app for Facebook Messenger will not work.
There is a converted barr file of the Android Facebook Messenger App you can sideload that works (in a sense - you must keep the app open to receive notifications).