With the introduction of Panther, there's yet another swathe of users whose printers are now unsupported. But rather than just chuck my printer out, I decided to use Classic to print my documents as PDFs. This has been noted before, but to make the process more seamless, I used OS X's PDF Workflow feature, which extends the existing "Save as PDF" print option. All you need is 10.2.4 or above, Adobe Acrobat Reader for OS9, the Classic environment, and OS9 drivers for your printer.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20031207221440783