Hi guys,
I think I found a better way to handle the Amazon AppStore problem.
http://code.google.com/p/speakerboost/source/browse/trunk/src/mobi/omegacentauri/SpeakerBoost/MarketDetector.java?spec=svn13&r=13
This will solve all my problem without need to have 2 apk.
Cheers,
Gabriele