are you just looking for the source code to an app so you can amend it to produce your own app? Or was there another reason you needed the sourcecode?
There are only so many HelloWorld tutorials I can read/implement (in other languages, non-mobile), before getting bored of doing tiny, completely unrealistic things with code. Seeing how a larger codebase, particularly one that I've been using as an app for some time, is structured and hangs off device services (lbs, vibration, or even just graphics) is of huge interest to me
Not sure how easy it would be to open them up given that cracked apps appear on jailbreak sites all the time, if the DRM can be removed there must be access to the source code.