I know it's done, and fairly popular. I had a question about using a trackball rather than the touchpad on the computer. The space where I mounting the computer is limited, so a normal mouse would not work well. Any recommendations on trackball brands, and type of connector?

Plus, I know I'll have a GPS plugged into the computer, but I'm not sure if they use a USB or a serial port. Any thoughts there?

What I'd really like to avoid, is running out of ports on the computer and still need to hook something else up.

Thanks!