Minecraft on Xbox 360 gets a host of fixes in Title Update 8 today, but no Ender Dragon as Play XBLA previously reported. Ender Dragons certainly are sneaky beasts, considering their size.
Title Update 8 includes fixes for a few random crashes and freezes, to force a Nether Fortress, Blaze Spawner and Nether Wart to always be present in the Nether for a new world, increase the Mooshroom spawn rate, add an Awkward Potion, improve animal breeding mechanics, and change the "Download Content" menu to "Minecraft Store." Check out the entire changelist below, as provided by Play XBLA.
Ender Dragons, part of "The End" of Minecraft, are part of Title Update 9 and they will have sound, developer 4J Studios tweets. Rawr.