The News Feed on Facebook provides a list of available bonuses, gifts, and XP for a variety of applications, including CityVille.

Picture	Category	Title	Subtitle	Click	How to Post	Reward
	Building	User is getting ready for trains from Charlieville!	User built a silo for Conductor Charlie to help ready the trains. Click here to build your silo and collect some free Goods!	Get CityVille Goods	Complete a Building.	20 Goods