You're right Wibble, there are five...I forgot about the workprint version which has never been seen before.
You must have the same version as me...came out about two weeks ago in the metal box?
I ordered mine in BleRay from Amazon in the states and a second copy in the suitacse with all the bits and pieces to put away in the hope it becomes valuable (or until I get pissed and want to open it up). It was allegedly dispatched to me today which means it should reach me down under just before or after Christmas. Don't tell me anything about the Final Cut please.