After a recent heated discussion on the Apple-X11 mailinglist, someone emailed me privately to ask me why I run MacOS X if I dislike the limitations of the UI so much. My response was that I like the hardware and I like the OS, and there's a few apps I use in OSX which have no Linux equivalent.
My usage patterns of OSX is where I primarily run X11 applications (badly) but then have to put up with doing this under an environment it's not suited to (Quartz).
So, I've been thinking about going the other way around and running MacOnLinux under LinuxPPC.
Update
I've decided to just go back to XDarwin and stick with OSX.2, thanks to a few private emails and some comments on the Kuro5hin version of this entry.