It's easy to enable OS 9 clients to print to your shared PostScript printers on a Jaguar server; all you need to do is set up cups-lpd on the server. First, add a new file 'printer' to the /etc/xinetd.d directory containing these lines:

service printer
{
  disable       = no
  socket_type   = stream
  protocol      = tcp
  wait          = no
  user          = root
  server        = /usr/libexec/cups/daemon/cups-lpd
  groups        = yes
  flags         = REUSE
}

Then restart xinetd with:

 % sudo killall -HUP xinetd

Obviously, "Printer Sharing" needs to be enabled in the 'Sharing' Prefs panel, and if you have the built-in firewall enabled, add a new rule to pass through port 515 (lpd).

OS 9 clients then have to create a new desktop LPR printer, with 'hostname' set to your Jaguar server and 'queue name' set to the printer's CUPS name as displayed by...

 % lpstat -v

... or the CUPS web interface. Of course, this also works with any other client using LPD instead of IPP, such as older UNIX boxes.