Atari has released an app for the iPhone/iPad called Atari's Greatest Hits (iTunes affiliate link) that comes with one game - Pong. You can then, using in app purchases, buy packs of other games ($0.99 for 4 games) or all 100 games for $14.99.

You owe it to your children and your children's children to install this app and show them our history, our heritage, where we came from.

And then if you're really serious, pick up an iCade to plug your iPad into and show them how it was really played back in the day.