Before we wrap up this project and make the repo public, we should remove links to the audio file archives since we don't have the right to redistribute. (Instructions are in the setup.md doc for our own sake for now.)

David should we make "return str(random.randarrange(100000,999999))" in sms_sender.py return a 4 digit confirmation to make it easier on user?

Murali are confirmation number collisions a big concern as we scale to 8K kiosk?