Mobile gamers rejoice, because the latest and greatest release of Minecraft Pocket Edition has been submitted to the Google Play store, the App Store, and the Amazon App Market. The main developer Johan has also put in a change log for the update that includes Paintings, Mushroom Farms, Melons, Zombie Pigmen, the new Nether Reactor, and Glowstone! Johan stated in his livestream that not all of the intended features of 0.5.0 are in this release, due to the timeline to get the game published before Minecon 2012 in Paris. He stated that more features will be implemented in bug fix patches over the next few weeks and in 0.6.0. See the source link for the complete changelog.
Source: Mojang