Minicraft, the 48-hour game from Minecraft creator Markus "Notch" Persson for the Ludum Dare 22, has been given an unofficial Android port. It's free, just like the PC game, and available now on the marketplace.
The app (via Joystiq) was handled by "Folstad Consulting Inc," which usually makes phone book tools. It uses a virtual D-pad, but otherwise seems similar to the PC version. Folstad is careful not to take any credit for the original game, stating the port is just "for fun and to learn the codebase."