Our standards-based, open-source home automation system is now (almost) available. The facts:

• Each device has an unique IPv6 address.
• Devices communicate using 6LoWPAN on 868 MHz (yes, its a mesh network).
• There is a direct mapping of devices to (globally unique) IPv6 adresses.
• Each device runs Contiki, a nice little operating system with support for networking and processes. TCP, UDP, and ICMP are directly available.
• Each device also runs a webserver that provides a little configuration interface (just like your network router)
• Hardware is based on an ATMega1284 - use avrgcc or WinAVR for development.
• Both hardware and software are open source.
• Provides excellent interfaces for hacking (both hardware and software).