Well here's a complete remote surveillance camera package using celluar network

http://www.smartscouter.com/ssDefault.aspx

This camera appears to be modified cell phone and I have no idea why I can't find this setup except as an aid to deer hunting but that's it...and its expensive...but conceptually this is exactly what I have in mind as a perfect remote surveillance cellphone-based camera.

But this package (without the wireless subscription and web site...better would be to use your own subscription or a new one and your own web page) is exactly the ticket...that is..a long life battery, the ability to control the camera from a PC or cellphone and most important that uses the cellular network to receive instructions and to send images.