I bought this portable terminal for US$40, if I recall correctly, at defcon 10. I've got it working now to the point where I can use the terminal to log in and do regular terminal things, from ls and clear to mutt, lynx, and ircII. To read about my initial tribulations in getting the terminal set up, see the techtalk thread.
Thanks to Kirk Russell for pointing me to his pdf scan of a pocket guide to the terminal!
t1:2345:respawn:/sbin/agetty -h 9600 ttyS1 vt52