I'm pretty interested in something like this. It seems to me that all these services like Dropbox and Google Drive are charging for something the vast majority of people don't need - online storage of data - when what they really want is just sync of data between devices. While storing the data online makes the process more user friendly, it opens up a raft of other problems like legal liability and of course, most of these services are built around models that charge for storage, so you end up paying more and more the longer you use them.

I'm sad that LiveMesh is being retired by Microsoft as it actually did exactly what I want - just P2P sync. I'm looking into OwnCloud at the moment.