It's been a long time coming, but Patch 1.7 launched into Minecraft today, adding pistons and shears to the game. Of course, for those of us who mod the game, we'll have to wait until Bukkit updates before we can start building our piston-powered mega machines. Personally, I look forward to adding hidden doors to my current project.
Here are the offiicial patch notes from 1.7, in case you missed them:
Note: Sheep no longer drop wool from being punched
And finally, to celebrate the new patch, here's the official Minecraft 1.7 trailer, although the behind the scenes is equally, if not more, interesting.