I still have various Zaurus SL-C3000, SL-C1000, SL-C860 and an SL-C5600.
I tried all the distros and found pdaXrom was the best of the lot except that it didn't suspend power - unless I was doing something wrong*.
It would run through the battery very quickly!
If this one thing was fixed I would use it again.
At the moment I'm experimenting with Arch Linux.
*I have since found that 'apm --suspend' seems to do the job, using r121 build on my SL-C860.