Even if you don't turn Bridge off, as soon as tbe device is out of Bluetooth range, the "lock" screen will show for any Bridge app that was active untill the connection is back on.
you shouldve been able to answer the call with the Playbook that would be a killer feature
... and see the callers profile picture, most recent FaceBook, Twitter, LinkedIN updates, e-mails conversations, calendar appointments, birthday (highlighted if today/tomorrow) and spouse/kids name.