Thanks guys! In my case, a pin or the fingerprint works for my corporate access. Unfortunately, the fingerprint sensor doesn't work reliably. When it does work, it's terrific, but most of the time, there's a long delay before it responds (so that it's actually faster to type the pin) or in some cases, it doesn't work at all (it doesn't respond at all). Then I have to restart the phone to get the sensor working again. Sometimes, even a restart won't work.
Therefore, if I'm in a hurry, I just go straight for the pin.
Oh, and John - I saw that thread, but it's no good for me because they said you have to bypass the security but I can't do that because of my manditory security policy.
The weird thing is that on my tablet with the same policy applied, I CAN use widget locker to access the Vignette camera app without unlocking the tablet. I wonder why the behaviour is different on the Atrix?
Anyway, I do appreciate the replies!!