I think Apple's got better things to do with their time than to police against the 3 Clojure iPhone/Pad developers out there using some kind of cross-language compiler.

Plus, if Apple did start enforcing against Clojure->Objective-C, it'd be sort of cool. Imagine Clojure in the big time... the HN headlines: "Functional programming keeps Steve Jobs up at night" or "Steve Jobs and Rich Hickey seen outside coffee shop in Cupertino -- Eric Schmidt feels lonely". Right, not gonna happen, keep cross-compiling away.

(There is a warm space in my <3 for all that is Clojure and I haven't touched another language in 2 weeks)