the wrong way?
(just thinking out loud)
I found this sort of puzzling. So what is the AT&T hub doing apart from providing routing to the 'net? Rather than have a proprietary hub serving 'things' I thought the Internet-of-things was all about autonomous devices providing data back to the cloud.
Well I guess the hub could be a personal cloud but you may as well base the cloud part offsite (i.e. not at your home but using an online service).
So some scenarios: Home security - the door magnetic sensor detects a change a logs a 'door event', the door mat records a pressure change so it 'knows' someone just came in. It sends a broadcast to the local network which is received by the lighting gadget to switch on a light after querying the outside light-sensor for light level data. How good is that?! I'm going to whip out the Arduinos later and try it.
Still don't need the central hub though.