One thing about video monitoring... It does nothing to scare anyone away. So you get a picture of an ugly mug taking your stuff. No on recognizes him. Also, if they see the camera, they're going to look for the VCR, which probably means a ransacked house. Maybe putting up a sign at your back door that reads "If you can read this your picture is already on the Internet via wireless connection." would help /forums/images/graemlins/grin.gif
I still think the best thing if you don't want a monitored system is to have a loud siren both inside and outside the house, and an autodialer that calls several sources, preferrably via cell phone, with a recorded message. The X10 stuff can be interfaced to just about any alarm system to flash tons of lights off and on, too. As many people have stated, the guy will probably seek easier targets if it is in a populated area. If it is in a secluded area, he might just drive around a while to see if anybody shows up, then break in anyway, regardless of the alarm.
Someone mentioned garages. Light beams are great for garages. The animals can still run around under them. In our old house we had one in the garage that was mounted near the service door and ran to a mirror, which sent it around the corner, past the window and to the reflector, which was mounted on the overhead door. The reflector then sent it back. This covered the sevice door, window and garage door with one $39.00 device and only one place to hook up wires. The dog could go in and out all day through the pet door. I figure so could some skinny burglar, but he'd probably open the service door to leave. They are lazy, you know /forums/images/graemlins/wink.gif