Ok, i can tell you what i am working on about the moment:
i am totally raping the Google API as i am sitting on an online PIM for my
n800 - what means that it even will work with the n810

But at the moment the Google API is raping me back *sigh*
so that development is realy realy slooooooow.

Instead of syncing i also suggest or to use GPE with Erming
or check other online applications.