HN user
It's very important, and the first one I'd be asking if I wasn't a Ninja.
Right now, no. But it's something everyone wants. The main thing standing in the way at the moment is that the rules engine runs in only the cloud, but we will make it run locally as well. It's just a timing/effort thing.
(and open-source will mean others can work towards it too)
You can also just SSH in and 'git pull' a driver if you prefer =)
There is a basic Z-Wave driver ( https://github.com/ninjablocks/ninja-zwave ) but (at least to me) BLE and ZigBee look a lot more interesting at the moment. Lots of fun gear being released for both, and decent mobile support for BLE will lead to some interesting stuff.
That breakout board just provides the pins already on the Pi. The Ninja Pi Crust has an Arduino on-board and provides compatibility with existing Arduino shields, as well as wireless 433mhz communication (to turn lights on and off etc.).
(Disclosure : I'm a Ninja, and yes... an Aussie :)