HA. Figured it out! If you are trying to get rtsp streaming working with dbus-switchboard, please wait for 1.2.12 because that's where I finally figure out that I had to add an rtsp line to the dbus-switchboard.desktop file!

With this version, you just change the rtsp line in the URIs tab and dbus-switchboard will take over. Then you have to figure out how to get it to play in the media player of your choice.