@bobstechsite I have XFCE installed, but a 800MHz G4 with 256MB of RAM just isn't enough. So I use cwm (calm window manager), rxvt-unicode, and text-mode tools like joe, vim, cmixer, mpg123, flac123, mutt, and ranger. If cwm is too minimal, you could try openbox as your window mangler instead.
@bobstechsite You're welcome. Make sure to read the macppc instructions for OpenBSD, and as long as you handle partitioning properly and set up the Open Firmware boot, you should be fine.
@starbreaker I've installed 1.5GB RAM, so I'm feeling good about XFCE's prospects. 😃
However, given my experience of failing miserably to install ppc builds of GNU/Linux I'm already mentally prepared for it to take more than one attempt to get OpenBSD working!
Thanks for the tips re: lightweight desktops