I have been working on a few different shield boards for the Arduino platform. In an attempt to make life easier for myself I created a couple starter files in gEDA format for my future projects. The board has the four headers and mounting holes for an Arduino shield board. I've decided to release the files into the wild for anyone to use under the Creative Commons Attribution 3.0 Unported license.
You can find the files at my website:
Enjoy,
Eric