Geeks.com has been out of stock on the wireless camera I purchased last year and it appears that model has been discontinued. But the good news is it appears they have a replacement for about $5.00US more than I paid for mine.
Take a look here for details. It looks a little different than mine but you can almost see how easy it will be to superglue that camera mount to a Technic piece for easy connection to your robots. Still requires a 9V battery.
You can view some of my robots with the earlier version of this camera by clicking the links below:
Camera and housing: http://thenxtstep.blogspot.com/2006/10/wireless-cam-sensor-not-available.html
Wireless Control via Laptop: http://thenxtstep.blogspot.com/2006/11/running-sneeker.html