Exp Event Suggestions

So I've worked with several others MMO's and one of the most successful ways to expand interest in the game on social networks is by promoting Exp Events. An example of how this would work is to choose a network, ie. Myspace, Facebook, or Twitter. If the chosen site gains 4000-6000 adds in a week time period then an Exp Event is granted for a few days on the servers as a reward. This is effective because when I add a facebook community as a fan it notifies my friends of it and allows them to gain access to the community and check it out, thus increasing how many people veiw the community and learn about Perfect World.
Just an example of ways to get the word out about Perfect World and reward its players for their work.