greenlab, have you got any thing working yet? Im no expert, but i recon it would be possible to control a parrallel port printer from your arduino, as at the end of the day, the parrel port uses the same voltages. And im sure, at the most basic, you can send ascci charictors! Youve got me interested, im going to look in to it. I'll let you know what i find.
Phill