Both Apple and Microsoft have blocked the distribution of copylefted Free Software through their App Store and Windows Phone Marketplace respectively. Though there’s no indication or reason to believe this might happen with Google’s Android Market, I wrote their Open Source Programs Manager, Chris DiBona, asking him about the possibility. He replied:
No, we have no plans to restrict copyleft based programs. When we were creating our application market for android, we wanted to make sure that developers could offer programs that contained open source and free software. (email: 2/20/11)
Google’s inclusive approach to licensing will only help make their market more appealing to developers and users alike.