This thread prompted me to give it a try on my HP color laserjet 1312... It supposedly supports PCL6 and Postscript. And with 160MB of RAM (in printer), shouldn't be an issue to print many, many pages...
Was able to use either NetPrinter or LPR in both RAW and LPR mode no problems... The prefs applet for netprinter likes to crash (i.e. guru) a LOT. And LPR requires shell command to configure. But either way, not such a big deal.
Printing via the os 3.9 laserjet 6 driver was no issue. BUT, the os 3.9 postscript driver would always guru - didn't matter netprinter or lpr.
Also tried turboprint 7.05 and 7.6 with the color laserjet 5 driver. Seemed to work just fine although the color was a bit off.