As the belle of the social-media gaming ball, Zynga's FarmVille has engaged in quite a few corporate hookups of late. There was that 24-hour fling with McDonald's, then another promo with Farmer's Insurance. Now, DreamWorks is promoting its upcoming movie Megamind with a "Mega-Farm" amusement park inside the game—part of a one-day-only promotion tied to the animated movie's premiere today. For those who play the game and annoyingly bug all your Facebook buddies, the promotion includes a "Mega-Grow" formula which helps you instantly grow crops that don't wilt and a collectible decorative item for you to feature in your very own farms. Virtual farmers, rejoice!