From a non IT guy perspective - I recently discovered that our units were locked down. Of our install pool (maybe 200+), we have only a few people who have internet access. I was approved for access and approved to try out the Nextel Telenav system. After going to the website, I found I was unable to download. A quick call to the BES admin and we found how locked down we were. While I agree with NJ and jibi to a point on security, in my case (with a restricted internet access pool - and they do not have BB Desktop installed on any of the systems), I think the security goes a little too far sometimes.
Life is what you make it.