Soon to cost the nation millions of hours of sleep

Sid Meier's Civilization, one of the most successful computer games ever, will have a Facebook version coming out later this year.  Your humble blogger has been playing this game, and its later iterations, ever since it came out in 1991.  This one, says Sid, will be free.

Hint:  Play the Iroquois.  The mounted warrior is the best offensive unit in the early years of the game.