So, I went into the apple store to get a mini dvi adapter. I said to the guy, mb's should come with this adapter since it's a proprietary item. He said it's not proprietary because anybody can use it. I had previously stopped at office max and radio shack before going all the way to an apple store. it's not even listed in a radio shack online catalog. if nobody makes one but apple, and nobody use one but apple, it's as close to proprietary as you can get, and it should come with mb's.