I have a german languaged (and with German Starting Credits) open matted Version of George A. Romeros European 'Argento' Cut of "Dawn of the Dead". (Sorry, not english friendly.)
I really love open Matted Versions with more informations, and I think it should be common to bring both Versions to the masses (like the original "Evil Dead" BD).
I also remember that my VHS Tapes of "Desperado" and "From dusk till dawn" were open matted.