> Some newer printers are noticeably absent

The printers listed on http://www.morphos-team.net/hardware.html are only the ones that are directly supported by the ancient TurboPrint version that comes with MorphOS. Newer printers that are PCL compatible might be supported by some of those old drivers. Best bet however are modern printers that are PostScript compatible (see geit's statement quoted above) and thus don't require TurboPrint nor any other special drivers to print from MorphOS. At the moment I'm contemplating with the Lexmark X203n as a network printer.