This is a totally awesome thread. I have had a Raspberry Pi for a long time. One of the things I wanted to do was develop some sort of web based sprinkler control system for my house.
I am glad to see that it is already done and it is open source, except for the board.
So, I buy the board from Rays Hobby for controlling sprinklers that is designed to attach to an arduino and it will work with a Raspberry pi?
And I get the programs and stuff from here.