We use the buckeyecam system all you need is a computer within range (couple miles) and you can have multiple cameras transmitting back to the computer and upload to anywhere using your computer's internet. Make sure to check the usage fees on the cell based cameras most are really expensive in the long run.
You can have the pictures/videos sent to the livecam site and or emailed to anyone automatically. Plus you can operate multiple cameras from the same computer - livecam siteBuckEyeCam LiveCamera
Also Buckeye Cam is coming out with a new Apollo system in 2008 that is cheaper and you can add the wireless feature. No service fees and take thousands of pictures per camera per week easily.
Here is a link to our livecam site - you can see what went by the camera recently and BuckEyeCam LiveCamera
Just click on the camera to view the most recent 90 pictures per camera.