Funny story (missing the point I know), the Dropbox client has provisions to automatically detect other clients on your network and then sync your files to your

Funny story (missing the point I know), the Dropbox client has provisions to automatically detect other clients on your network and then sync your files to your other computers over LAN rather than through Dropbox servers (files are still synced to the servers of course, but they don't have to make a return trip to your other computers).