Everyone has heard of the xcam.... I was thinking about going this route as its all a good OOB unit. For <200 bucks, I get 3 cameras. They all talk wirelessly to a central box, they all need to be wired up to a central box for power, which is AC (no problem, just tuck away an extra inverter), and this video reciever box can connect to the computer (I didn't read how, I assume usb), and it comes with software that lets me record everything, and make it available over the internet. This is good, but not good enough.
First off, the wireless cameras are relatively large, due to the antenna. I don't really need the added complexity of being wireless. A series of rcas is fine for me actually, as its all in a car as opposed to the home. The unit this way will turn on with the acc key position so it wont drain the battery, thats good.... but there is a quality issue here, plus the cameras are not water proof.
I've seen a lot of cameras that are, and thats something that I want.