I have 4 of these:
VideoSecu CCTV Security Camera 1/3” SONY CCD Outdoor Indoor Weatherproof Night Vision IR Infrared Free Power Supply BUH
http://www.amazon.com/VideoSecu-Security-Weatherproof-Infrared-BUH/dp/B001DBROYK/ref=sr_1_1?ie=UTF8&qid=1298315628&sr=8-1
Stay away from wireless, picture quality is crap.
If you want a nice and easy to use DVR I also own one of these gems.
New 4 Channel Embedded Linux US411L H.264 Network DVR With No Hard Drive, Real time True Triplex with built web server for remote viewing and operation, backup and operation 4CH DVR 120FPS SATA ready.
http://www.amazon.com/Channel-Embedded-US411L-Network-operation/dp/B0013F6XJS/ref=sr_1_1?ie=UTF8&qid=1298315712&sr=8-1
I appreciate the info. But this for nuns who a) have very limited funds and b) have way too much on their plate to deal with gadget overload.