I love Minecraft PE as much as the next guy, so I was pretty bummed when I saw this. Johan, a Minecraft Pocket Edition developer at Mojang, posted today that the release of MCPE 0.5.0 has been pushed to, "sometime in November." Don't fret, because he promises that it, "will be awesome when it's released," and mentions something called a 'Reactor'. He previously said he was planning to add an alternative to the Nether to 0.5.0. Whatever will be in the update, this time around Kindle owners will join Minecraft players around the world to spam the Refresh Updates button in unison.
Source: Twitter