I really like the sync feature that was added recently. What would be really cool is to have an option to skip folder and/or files that I don't want transfered.
For example, I keep a folder called "dev" in each of my web site project folder locally, but don't want any files in there being sync'ed. Also, Windows XP creates alot of "Thumbs.db" files that don't need to be on the server.
If you can add this feature, I would seriously consider making another donation!