Another item out of BlackHat was how to take over ZWave devices and turn off alarms, open door locks, etc. I don’t know much about ZWave, well I have heard of it, and know the stuff is a bit pricey for me to play with (X10 and other items are cheaper).
http://packetstormsecurity.com/news/view/22920/Burglar-Systems-Easily-Bypassed-By-Hackers.html