If you own a Zaurus and want a really great Linux distro for it (this means you are insanely geeky by the way), then head over to Omegamoon's blog. Using the Mojo project and their repository for Ubuntu on the ARM architecture he has put together a really nice distro. Its still only a Release Candidate (RC) but its working well enough for me to really play around with it.

The really important thing that Omegamoon did was to create a multiple distro boot kernel. With it, you can have multiple partitions on the internal drive, a CF card, or an SD card. At first he didn't have instructions for how to load it up on an internal drive, but I figured out that as long as you get the drive formated and the files on their that his kernel will see the distros on the internal card and list them for bootup. 

Now, thanks to Omegamoon, I can have Zubuntu, Debian, Angstrom, etc... all on my little Zaurus. Sure there are some little issues here and there, but overall its pretty awesome.