iPhone developer Return7 posts that Apple has rejected a version update to their CastCatcher radio app. The reason for rejection is cited to be "excessive" bandwidth consumption over cellular networks:

CastCatcher Internet Radio cannot be posted to the App Store because it is transferring excessive volumes of data over the cellular network, which as outlined in the iPhone SDK Agreement section 3.3.15, is prohibited

The developers note that the application doesn't use any more bandwidth than other competing iPhone radio apps. Apple has also accepted earlier versions of the application to the App Store.

CastCatcher version 1.2 remains available in the App Store: iTunes Link.