When developer Manomio learned that the C64's BASIC interpreter was the problem the first time, it removed obvious access, but left the interpreter in the software so it could be re-enabled later if Apple changed its mind. However, some users discovered how to access BASIC. Apple found out and removed it before anyone could use the C64's incredible computing power to blow the iPhone platform wide open.
Manomio has (re)re-submitted the app, so hopefully it'll actually make it to the App Store and stay there this time.
[Via Engadget]