If you're already using a computer, why not build a transparent Go board out of acrylic, and put a webcam underneath it. Then use image analysis to determine the stone placement. Look at some of the existing multitouch projects for inspiration.
If you're already using a computer, why not build a transparent Go board out of acrylic, and put a webcam underneath it. Then use image analysis to determine the stone placement. Look at some of the existing multitouch projects for inspiration.