Upon reading the description of this project, I was hit with some inspiration to maybe try something like this on a smaller/less ambitious scale with my future cab.
I still intend to do a traditional marquee, but I REALLY like the idea of a dynamic, LCD-based controller configuration diagram.
One way to do it would be with a hacked Palm Pilot, which I could imbed in my control panel. Some of the older Palms can be had for a song these days... all you'd need to do is solder in a constant power supply, hook it up to your PC with a standard sync cable, and then install THIS on it...
http://palmorb.sourceforge.net/index.html... along with some fairly simple custom software to send the appropriate CP configuration data.
You could also do the same thing with some custom software and a standard serial/USB LCD module if you don't have a spare Palm Pilot lying around (I like this particular company and its products, though I have no idea whether or not they're the cheapest:
http://www.crystalfontz.com).
Of course, with the LCD and Pilot/PalmOrb combo solutions, you're still limited in what you can display (text, mostly). In the end, I think I'm going to write a slightly more complex software solution, which would push a bitmap image to my Palm over the connection cable, and then force it to display (totally foregoing any kind of LCD emulation scheme).
Regards,
Corporate Dog