All I want to do is to get all the diary and address data from my Palm (I use Palm Desktop) into the Z.
The simplest way I have found to transfer the address book data form my PalmOS device to my new C3000 was to beam them category by category. You still have some cleaning to do afterward, but that's at least a good start.
For the Datebook, though, I had to use Intellisync. Wasn't easy to setup, didn't work well at first, got it to sync once with Palm Desktop, it has broken since, but eventually I got my agenda stuff transferred. It's probably the worst side of the Zaurus: bad PIM apps, and worse sync options... You'll need some skill, a lot of luck and even more patience to get it to work!
The good thing is that the one time I got Intellisync to work, it transfered my todo as well. The bad thing is that I wasn't able to transfer my memos - mostly because the Zaurus lack a simple memo application like the PalmOS one. I'm trying to manually cut & paste them from a CSV file I exported from the PalmOS to insert them one at a time in IQNotes, but it's a pain (no, IQNotes doesn't have an import function...)
I was luckier with my SplashID data (login, passwords, bank data, etc.) because I was able to export them in a .csv file, modify it a bit on my PC, then re-import the whole stuff in SafeDee. Not 100% perfect, but it was almost the easiest part of transfering my data to the Z!