Any chance this model will be supported via USB?
Crystalfontz (http://www.crystalfontz.com) Intelligent Serial LCD Module 632 (16x2 characters) and 634 (20x4 characters) 
Hmm, doesn’t seem to work for me, and the only drivers I see are for the 633. I get garbled stuff all over, but nothing readable.
Try using the same driver as for the 633 version!
Yes, have tried that with only gibberish on the display; it also turns the backlight off entirely when any changes to contrast are made.