The scheduled released date for Backup Assistant for Blackberry was actually March 1st. The application will be pushed to your device as a Virtual Pre-load, the same way Slacker, Facebook, VZ Navigator..etc are pushed to your phone. RIM does this push in batches, so as not to overload their servers with downloads. They do it in batches of thousands of customer's at a time, so it may take a week or two before you get it pushed.
Soon it should also be available at start.vzw.com for manual download from your Blackberry browser.
At any rate, if you have a Gmail account I recommend downloading Google Sync and skipping Backup Assist. VZW's applications tend to be laggy and bloated. Google Sync is a simple, lightweight application that auto syncs your contacts and calendar to your Gmail account. Download it at m.google.com/sync from your Blackberry browser.
