Civilization fans will be able to play the game on Facebook beginning this summer. There is no official date when the game is going to be released by, but the exception is June

The June release will be beta testing only, and the official launch will be beginning of 2011.

There are quite many Facebook application out there, but it seems to me that the most  popular ones are games related. Here is a list of top the 23 most used or added applications on Facebook. The number you see after each description is the active users/month. Also, I added a link to each application if you want to add any of them.

Ancient Egypt is calling once again in this sequel to one of casual gaming’s most popular diversions. With 88 new levels and visually stunning graphics, Luxor 2 is on target to become more popular than the original.