Which head camera?

for videoing your commute etc i have just been told to look at these

Mini DV DVR Sports Video Camera Spy cam SpyCam MD80 DC

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=300386276882

£13 shipped from china, usb cable, rechargeable etc

get two, one on front, one on back and then when you have an incident you can email the footage to the police

one of my lecturers (a cyclist) was saying how one of his friends video's all his commutes for this reason, has had no need to use it yet.