One thing, the sharp rom comes in two flavors, version 2.28, and 3.10 (or 3.13). If your zaurus hadn\'t been updated, it probably has the older 2.x rom on it. The 2.x version will work with notessync, but the newer rom won\'t. The 3.x rom version is a bit better in some ways, it is basically similar to the rom that ships with the 5600 and newer models (kernel 2.2.18 v.s. the older 2.2.6, newer apps, etc). Most of the more receint development is going to work beter with the newer rom, simply due to the similarities with the other zaurus models. However, the new rom also has new pim apps, and they have a different (and poorly documented) data file format (called dtm). The older pim apps use xml to store their data, so you will find broader support for them.
Now OpenZaurus\'s pim apps use the older format, and I think that notessync has been updated to support OZ.
Hope this helps.
--derek