I wish I could send a URL to a friend to share a folder like: btsync://sharefolder?key=asdfasdfasdfasd&folderName=XYZ and it would launch the bt sync app and prompt them to create a folder that will sync with the specified key. The folderName would be a suggested name that describes the share and maybe prompts them to create a folder with that name in a default location (e.g. their home dir, or the last created bt_sync top-level directory). I think it's possible in OSX and possibly Windows/Linux to open an app by URL. http://stackoverflow.com/questions/471581/how-to-map-a-custom-protocol-to-an-application-on-the-mac
