Another benefit not already mentioned is home security. Getting some cheap zigbee window/door/presence senors, I was able to completely set up a home security s

Another benefit not already mentioned is home security. Getting some cheap zigbee window/door/presence senors, I was able to completely set up a home security system for < $200 by myself. That's about an order of magnitude less than existing solutions. Granted its a self-monitored solution, you could just as easily pay for a monitoring service afterwards.