This is probably trivial to more seasoned C++ developers then me, but I just managed to set up OSC communication from an iOS app to Max. The iOS app uses Cocos2D and the oscpack library by Ross Bencina.
This is an important first step towards being able to prototype sound design for an iOS game that Stian Remvik is currently developing.
It also gives me some ideas about the next steps forward in order to be able to use the JamomaCore C++ libraries for DSP processing with OpenFrameworks and iOS apps.