This seems counter-intuitive :
I was expecting that http://itunes.apple.com/search?term=Avatar+Cameron&media=software&country=FR&limit=15 would return all apps on iTunes, regardless of the specific platform (iPhone, iPad-only, Mac).
However, it does not seem to be the case.
Is there any other way to retrieve both iPhone and iPad apps than requesting entity=software, then entity=iPadSoftware, and merge the results?