Ask HN: Using an iOS app to raise money for charity?

Was talking to a couple friends who do humanitarian work (full-time) and one of them came up with the idea of building an iPhone/iPad app primarily for the purpose of raising money for a charity. So, basically:

- The app would have some, but limited, utility (a very basic game, simple info on a disease or cause, maybe a directory, etc.)

- The app would be over-priced relative to its value (say, $4.99 or $9.99)

- After Apple takes their cut, all proceeds would be given to charity

- People are made aware via the app's store description, website, FB, etc.

Anyway, I thought I'd run the idea by the HN crowd for some feedback. Would Apple approve such an app? Could it work as a way to raise $5 to $10k for a cause? Is there any chance it could really take off?

Any feedback, ideas or criticism is welcome.