Minecraft's portable exclusivity on Sony's Xperia Play (aka "PlayStation Phone") comes to an end this week. Minecraft: Pocket Edition will be available on the Android Market this Thursday, September 29th.
The mobile version of Minecraft is similar to the Xperia Play version, albeit with a virtual d-pad. Unlike the PC version, there are no enemies, and no health and hunger bars either.
An iOS version is also in the works, and will be available later this year.