If this supported the Insteon protocol life would be really really good in my house. No word on their site if it does or not. Right now I have a Venstar thermostat that is hooked into Insteon on my MacMini server.
I really hope they support existing protocols, Insteon being my first choice as well. But, it also won't suprise me if they go Apple-style proprietary, and I won't be a customer.
If they truly care about efficiency then interoperability is a must. It's wasteful when you have to buy and create new products just for compatibility.
If they add an API, you could theoretically get your Insteon controller (I use Indigo from Perceptive Automation) to pull from it, or maybe Indigo could support its protocol.