Found this puppy while doing some research:
http://mikkila.wabbits.org/fsbus/lcd/index_e.php
Looks like you can integrate up to 2 HD44780 lcd displays thru your printer port and a separate 5v supply. Looks like you can setup an auto pilot or a radio stack. Pretty much anything that has offsets in FSUIPC. Those HD44780's are pretty cheap and even come in different high contrast colors.