I love the Raspberry Pi, and I still want to send one up but I suspect this project will be using mostly Arduino hardware. I like the idea of so many CPU’s being available and hooked up to the same sensors. The sheer number of kits available right now is very compelling and in the end may reduce costs.
Here is some interesting links.
What I am particularly interested in is the large number of sensors available for the Arduino. Below is a video on the 37 sensor kit.