First let me wish you a happy new year (although 3.5 % of it have already passed).
At the end of December 2013 I have become a proud father of a healthy son. As this little wonder is requiring some attendance development work will slow down a bit.
But if you want to look into ThunderSync’s code or even want to help with some patches, here are the good news. I have moved it from Subversion to Git and created a GitHub repository: https://github.com/FrankAbelbeck/thundersync
Cool. Any thoughts on whether this could be a base for adding carddav support?