Here's a picture of the boards.
The switch board can be used as is, with 1/4" mini switches for a nice, compact unit, perhaps remotely connected to the main controller. Or it can used simply as a convenient means of wiring up conventional 1/2" switches.
An owner's manual, of sorts, can be downloaded here.
Here's a PDF of the schematic, including board layouts.
Here's the Gerbers, for those of you who want to roll their own.
And here's the source code in Parallax/TechTools (8051) format. I wanted to make it easy to understand and easy to debug. I made no attempt to make it small and tight, as shaving microseconds off a device controlling mechanical devices like motors and relays, at the expense of readability, seems counterproductive.