Add the credit card readers/POS tablets at stores, Starbucks, etc to that list, which mostly have tiny cell phone cameras built into them now (whether you knew it or not)
replies(5):
Please expand.
I'd actually find it pretty cool to get access to my own level 3 data for smarter budgeting/analysis (eg: automatic tracking of food stocks, separation of spend on luxury foods from basics etc), but I've not found a way to get access as an individual yet