If you've ever watched a domino artist set up a run by hand, you probably decided that's too much trouble and time to even attempt. The next step? Design a machine to do it for you. Matthias Wandel (previously at Neatorama) built a strangely simple wooden device just for that. It's quite impressive.
If you just want to see it in action, skip ahead to about 5:20. But then, you'll want to jump back and watch him build it, too. -via Digg