Ninja-fy Your Raspberry Pi
ninjablocks.comExcept there is already a breakout board for the Raspberry Pi called a Pi Crust: http://picru.st/
Hope they got permission to use the name.
Anyway, I do like what Ninja Blocks are doing on the 'home automation for hackers' front; they should probably get involved in Z-Wave although I believe that is somewhat expensive to license (?). There is another group doing a Z-Wave board for Raspberry Pi ( http://razberry.z-wave.me/) but they haven't committed to producing it for the Australian frequency yet (the Ninja Blocks folks are mostly Aussies I believe FWIW).
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 :)