I've looked at this project before, it looks like a nice implementation of rsync with inotify, but it seems to be just for a typical use case for rsync, ie, pus

I've looked at this project before, it looks like a nice implementation of rsync with inotify, but it seems to be just for a typical use case for rsync, ie, push your local changes to a remote host. I think if you try to use this like a real dropbox, ie changes occurring on multiple hosts at or around the same time you are going to run in to issues. Also does lysnc handle deleting data on the remote end and propagting those changes out (rsync --del). Also I'm wondering how it will handle conflicts and open files (which it says isn't recommended). I see the .dropbox dir using some type of uuid's or sha1 sigs so I'm sure its doing something more sophisticated to keep things in sync. I've noticed my daemon has died on my linux box every once in a while, and it somehow tracks multiple changes from multiple hosts and replays those transactions correctly and everything rolls up fine.