This thing is kinda cool, I dont know though there may be better alternatives...
http://www.wilife.com/Default.aspx
I got a pretty sweet surveillance equipment catalog at work I'm tempted to make my own system. The one draw back to this LukWerks is that it still has a cord from camera to power supply. Which I would think limits you to having to place them within a close distance to a power receptacle...
But I do like the ease of setup...
Then again I'm also looking at X10 stuff to turn on some lights and what not...anyone got any other ideas?
the x10 site
http://www.x10.com/