This is a demonstration of the piston block in Minecraft beta 1.7. The features of this block is mostly complete, but sound effects are missing.
The piston concept was originally developed by the Minecraft community member Hippoplatimus. Additional implementation details were supplied by DiEvAl.
This just in: I was toying with the new 1.6 update and found a way to enable the Sky Dimension world generation code to the surface world as a test: needs Minecraft Beta 1.6.6 singleplayer
wr.class. Install as usual (add to minecraft.jar, delete META_INF/MOJANG_C.*). Have fun. I hope Notch won’t be mad :S Generate a new world.