I regret paying money for this game when it takes me the best part of a week just to gather the materials to make a "super" project that I could put together in 10 mins on Dwarf Fortress out of kittenbones.
What do you want? They're already building The Matrix, here. It won't be long before someone's Minecraft game becomes self-aware and then... it's kind of a crap shoot.
Just to demystify this a bit: There are programs that will help you work out the redstone circuitry needed for something like this, and there are also level editors that allow you to implement the designs without having to build it up block-by-block. There's also the inventory editors to give you all the materials without mining.
This still took a hell of a long time any way he did it, but maybe not as long as some of you might be thinking.