Current Snapshot: April 26, 2012 12w17ahttp://www.mojang.com/2012/04/minecraft-snapshot-12w17a/
*Added editable books - I am SO excited for this. I can't wait to play with it and see how it is implemented. Hopefully this will allow players to write someone a message without the limitations and publicity of a sign.
*Wooden half slabs in four colors (and they act as wood instead of stone
) - When this was posted it was like 1000 men cried out in unison "FINALLY"
*Bug fixing and tweaks, notably about entity collisions, “picking blocks” (creative mode), and chat
*Some other, censored stuff