If I were to meet Miyamoto, I would get him to sign my pair of Legacy X Nintendo 07 Mario shoes, but having him sign a Mario game is a good alternative. Ebayer "gamingoffshore" is sending off a signed box of Super Mario 64 (PAL). Not only that, but it comes with the game and the original instruction booklet. Right now the bid is at £33.87, so if you are interested make sure to get your bid in before it's too late! Unless you're a certain staff that already has a signed copy of a Mario game....

Link: ebay.com