Since the current version 1 found it's way into BitCoining Server ;) and other things we needed to create a new version (to much soldering and crimping).
The version 2.0 is now directly connected to the GPIO of the Raspberry and the SainSmart relay we also added a micro USB connector to easily connect the 5V power supply.
For the GPIO we used stackable "extensions" to allow other applications to be connected as well.