Dan Gillmor makes some good points about the proliferation of cameras - and their increasingly small sizes:
What's the alternative, anyway? When cameras disappear into shirt buttons, will companies force visitors to undergo detailed searches or ask them to strip and put on different clothes? Now there's a way to welcome your customers.
The implications of cameras everywhere -- especially cameras connected to networks -- go far beyond this. Imagine how events of the past would have looked had tomorrow's technology been available at the time.
This is the sort of thing that must be causing security officers - both government and corporate - to lose sleep. How are they going to deal with the massive increase in storage capability in small devices, and the increasingly small form factors of cameras and video equipment? It's a new world out there, and "always on" surveillance - professional and personal - is going to be a part of it....