In a bold move Unity Technologies today updated their store and made Unity mobile platforms free again. They already made it free during a limited time in winter 2011 but it seems like the basic licenses will remain permanentely free this time.
I'm sure this is a welcome move for many and I'm looking forward to see many great new games.
Its hard to say why this decision was made but I hope that it is an indicator for future addon platforms, namely Windows Phone8 and BlackBerry 10, where such a 'support of the platform' would be very welcome for the platforms as whole. If I had to guess though I would assume that especially UDK, Cry and Havocs new free engine had a major impact as does Corona.