Just to throw in another option, what about something like this?
http://www.seetron.com/slcds.htm
(Note: I don't know anything about this company. Just picked the first Google result that I could use to illustrate my point.)
It could work nicely with the tech theme of your cab...
Those things are actually pretty cool. I've been itching to use one myself

This is a pretty cool idea, ekopp2. It sounds like something I could really use!
I don't know if any of you guys are familiar with a product 3Com came out with a couple years ago called 'Audrey'. It was supposed to be a 'webtop appliance' that was basically a giant palm pilot with internet access. The idea flopped (cost of manufacturing vs. demand), but Audreys are still out there being hacked to death by people that find cool uses for them (check out
Audrey Hacking). I bought mine for $100 about a year ago at a computer show, and I use it for a couple things that it wasn't designed to do (in addition to the stuff it was):
- Caller ID: It pops up a message on the screen when someone calls and emails me the callerID info
- MP3 jukebox: It interfaces with the stereo in my living room and plays streamed MP3s from my main desktop (don't forget - touch screen interface!)
- picture frame: The screen saver slideshows through Monet's paintings (to go with the rest of my living room theme).
There are a couple other products out there that do similar things: I-Opener, MailStation, WebPal.. See
here.
It's good stuff and you electrical engineers might be able to get one to work here!
Anyway, seems like a cheap way to get something like what you're looking for... and so much more.
If you have any ideas about this, share them! If you have any questions about the Audrey, let me know.. I might be able to help out.

/Steve