This may be old news but I just installed this on my Ipad and its worth every penny.
http://itunes.apple.com/us/app/pinball-101/id396146403?mt=8
Description
Learn to play pinball from one of the top players in the world, Keith Elwin. Already play? Then watch Pinball 101 to improve your skills! Featuring over 50 pinball games, Pinball 101 demonstrates all the flipper skills required to improve your scores, as well as game specific tips, pin-physics explorations, pin-fun, and more!