From ZBrushCentral: “With a single click of a button, GoZ lets you quickly transfer your geometry back and forth between ZBrush and other 3D application (sic) (…) we will be releasing the first version of GoZ with the next Mac OSX update in June, Windows users will be able to take advantage of GoZ along with all of the new features that have been added to ZBrush 4 when it is released this August.”