Joe (and anyone else interested...)
If you want to do a little due that includes calling a trucking company or two, here's a website I use at work:
www.safersys.org
under FMCSA SEARCHES, click on "company snapshot"
click on "name", enter a name in the block, and hit "search".
Voila...everything you ever wanted to know about a trucking company! Number of power units, addresses, phone numbers, safety record (the part I use), etc.
Not only will this site give you a lot of information, it gives you an idea of just how many trucking companies there are out there. Type in a generic name like "Jones", instead of a full company name, and look how long the list is...it's really phenominal.
If you have a larger company in your area, you may want to give them a call and see if they're familiar with the system, of if they maybe even have a test unit on board.
Just thought I'd throw this out there, in case anyone coule use it. It's more information than any one person can possibly use!