Seems like there are a few of us Zaurus usrs here!
I think the lack of marketing or any attempt at selling it in US sealed it's fate for eventual pull out. The clamshells were never even introduced in US less for importers.
I started with a 5500 and tried OZ for awhile, got fed up with its stability issues, lack of proper support for Chinese and snobbish replies on the forum. I left it to rot for awhile, tried Jornada 720 then got a C1000 zaurus and with Cacko rom, it's a winner!
I still ocassionally try out pdaXii13 to see if things are better, but so far Cacko is the deal.
Oh, and did I mention I'm surfing the web and replying to this forum on my c1000?
I think I'll use my z for another 2~3 yrs but its hard to move to a keyboardless device once you try it. Ah well, SHARP are really geniuses in making cool pdas and dumping them!