Anyone know of a 1970s-style dot matrix "computer photo" generator/converter?

Hi, All, I'm sure many of us remember the "computer photo" craze of the late 1970s - go to a mall, get your photo taken by a computer, then buy one of a number of trinkets (calendars, coffee mugs, etc.) with your photo rendered by dot matrix... an old family friend even had one of those rigs - driven by an Ohio Scientific Challenger III (a machine I've long lusted after). There must be a way to simulate that look today - some sort of GIMP filter or web app or something. I've been googling around for "ASCII art" and "dot matrix photo", etc., and have found some interesting stuff (http://blog.modernmechanix.com/2006/07/27/ascii-art-1939/) but not what I'm looking for. Ultimately, I just want to take a snapshot of me and filter it to resemble that 1970s "computer photo" look. Any suggestions where to turn? Discussions of how it was done and how it could be done with vintage hardware now are interesting and probably on-topic, but not the goal of my question. Thanks, -ethan -- Ethan Dicks, A-333-S Current South Pole Weather at 9-Oct-2008 at 00:40 Z South Pole Station PSC 468 Box 400 Temp -67.5 F (-55.3 C) Windchill -105.5 F (-76.4 C) APO AP 96598 Wind 12.7 kts Grid 31 Barometer 667.8 mb (11092 ft) Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html