While everyone else is reveling in MS IE on Darwine and whooping it up
with Wireshark, I've had troubles getting X11 to startup and run.
'xeyes' would work fine, but nothing more serious. I think I've got it
working OK now.

Uninstalled X11 by removing these:
/Applications/Utilities/X11
/usr/X11

Installed X11 from scratch from the Mac OS X 10.5 DVD

Update X11 with http://trac.macosforge.org/projects/xquartz/wiki/X112.1.4

Delete all of these:
~/Library/Preferences/com.apple.x11.plist
~/Library/Preferences/org.x.X11.plist
~/Library/Preferences/org.x.X11_launcher.plist
~/.xinitrc


I'm guessing only those last few deletions were required. Now it seems
to work OK.