Hey there I'm going to start a new thread because I think this idea deserves a little bit of attention. With regards to synchronising our Zotero data many of us appear to be having problems finding a suitable free webspace host that is reliable enough, or will tolerate the traffic and errors zotero creates.
I've noticed on a few threads, user 'bhy', comments that there is a GAEDav, but I can't seem to find enough documentation, or a simple solution (as I'm not a programmer... just a biomedical student AGGHHH!).

Check it out; http://code.google.com/p/gaedav/

look forward to your responses!