In this 2004 article they are suggesting a probable device to deactivate camera phones: http://www.technewsworld.com/story/35169.html
Many people will be stopped when bringing in an IPhone, Th-55 and Zire 72 because they have photo taking capability. Most likely most no camera areas will have to rely upon security pat downs and voluntary surender of camera devices.
(Yeah right they can't even stop video cameras brought into movie theaters...)
On another thread there will be security camera viewing done remotely by PDAs and some cell phones. Here is one sample: http://www.smarthome.com/971354.html
Hopefully I will be able to write more on this security issue....
Th-55 U, T/X, TG-50, Handspring Deluxe (3) and PSP user.