There's some good news for all you Pinball fanatics out there. Zen Studios, the creators of Zen Pinball, Marvel Pinball and Pinball FX2, have recently released Zen Pinball for iPhone 4, iPad2 and iPod Touch (gen4).
The game comes with one table - the Sorcerer's Lair - absolutely free. Further tables can be purchased if you want to supplement your pinball experience.