This is a member of the Viber Development Team!
You will be pleased to know that Viber for Blackberry is just around the corner now.
We are in the last days of beta testing, and presently compiling reviews from our beta testers. We hope to close this stage by the end of this month, and then finally release Viber for BlackBerry [beta] to AppWorld for all to download.
We will be announcing its publication, system req. and more, at that time.