Greg Hooke from Australia posted a message on the EZVZ Chat Page in May 2011 saying that he had a VZ-1 with four independent audio outputs instead of the normal two. We think this may be some sort of prototype as to the best of our knowledge there isn't another one like it anywhere. Certainly no readers of the EZVZ chat page have ever reported owning such a device before.
Here are some pictures which Greg sent me (right-click, "View Image" for full res version):
