I dusted the cobwebs off my soldering iron today to build this interface board for my Raspberry Pi. Designed by Quick2Wire (http://quick2wire.com), the board simplifies the access to the GPIO and I2C pins of the Raspberry Pi, making it possible to integrate sensors and actuators into programs running on the device. After constructing the board, I wrote a simple bash script to write to a pin (connected to a test LED on the board) and also read the state of another pin (connected to a push button switch).
My next step is to get the Quick2Wire Python API working so that I can try and writing my own programs that interact with the pins. In the longer term, I am hoping to be able build a version that can be controlled using Sense (http://sense.open.ac.uk).