This came up in the "Twitch Plays Go" discussion here on HN this morning. It's a terrific concept. And am definitely stealing it ;)

Highest vote count amongst N players decides move choice. Player votes can even be weighted by "success" based on past performance.

But rather than chess, which is a fully deterministic, perfect information game. I'd really like to apply it to stochastic games. And see how adept crowds can be at finding an equilibria.