> I'm rather surprised at the success so far. I think their difference is in their client-side software. All existing solutions (dropbox, etc) are single-fold

> I'm rather surprised at the success so far. I think their difference is in their client-side software. All existing solutions (dropbox, etc) are single-folder sync-all-the-files. This solution is more like NFS, but with extra features (keep files locally, keep revisions) and mapping of Document/Video folders between OSes.