Hmm I didn't think about the XML/SQLite issue. I would argue not to develop an approach to sync Tomdroid via Tomboy's filesync :-)
In an ideal world, I would want to do a quick U1 sync on the desktop, then a quick U1 sync on the Android device (in Tomdroid). I thought of the filesync approach as a workaround until the REST API is "finished enough". Maybe it is.
Anyway, if you already know how to parse the XML files, a little tweak of the Tomdroid file sync mechanism would suffice to provide a quick note import mechanism. This way I can do some more testing :-)
Read-only sync with U1 would certainly be much better.