Civilization World would be going into open beta sometime in the next week or two. The Facebook-based game has been enjoying an alpha test, so apparently, the build has advanced enough to have an open test.
According to the presser: "In Sid Meier’s Civilization World, players join together with their friends to create the world’s most powerful, richest, smartest, or just plain coolest civilization. Leaders will also manage and grow their own city to maximize production and happiness. Collaborative players benefit the most as they team up with friends to win great battles, create great wonders of the world, share technologies and spy on enemies. Play as much as you like, whenever you like on your epic quest to build the most powerful nation and rule the world."
Civilization World is just the latest classic strategy game to go free-to-play browser-based MMOTBS.