The email reads:
Dear [...],You have recently purchased the app store game. This app was made available prematurely. We apologize for the problem and have your original purchase price refunded to your account. This amount will appear within five days of your original payment.
Yours faithfully,
iTunes Store Customer Service
It is interesting that Apple is talking about an app made available early, because the App Store on iOS talks about a release date in 2009. What exactly will be the app is still not clear: perhaps we can find out in late January, when Apple's media event shrouded in rumors .