I actually have 4 cameras but the other is not hooked up at the moment.
Here is the cameras an where I got them. http://www.dealextreme.com/details.dx/sku.15974
There customer image is one I took of my dogs in front of the heater.
Each camera cost $59.80 an I had to buy long Ethernet cables that were $5 each.
They have been going almost a year with no problems.
The brooder cam has diapered in dust more than once an the one in the incubator has shown no sign of being harmed by the humidity.