Well, I just hope he actually finishes the villagers instead of leaving them half finished like wolves and achievements.
The nice thing about pistons and redstone is its reusable. I'm sure you'll come up with a more streamlined model with a little practice Ben.
Made a simple hidden door as my first piston project. Well, at least it would be hidden if it weren't for the lever sticking out of the cliffside.
Over on the MC forum I was looking at someone who could make either water or lava pour out of a hole with the flick of a lever. Seems to me it would make one heck of a trap puzzle. You fall into a pit and are presented with two levers. One floods the room with water, letting you float up and out. The other is lava, meaning instant death. Choose wisely.