I think Oktoberfest could be a great game. I was the one who emailed to Kaneda to argue that it had potential. My point was that until you see the game design (ie, art, playfield, music, etc.) you really don't have a clue. There are some title that would clearly be stupid for the pinball market such as Rainbow Bright. But a pinball machine celebrating one of the world's most beloved music, beer and sausage eating events is an idea at least worth talking about. I'm sure with the right creative people, an Oktoberfest would be killer.
That being said, I think the art package needs to be stellar. Some cartoonish-oktoberfest thing would not pique my interest (ala Whoa Nellie). Something like this for a backglass.