[UPDATE] A second in game update was released for the device... Its likely a continuation of the previous update.
Feeding the Trolls - Make Lisa read the Tapped Out Forum for 4 hours (175 45). You will be awarded an additional 100 and 10 for completion.
At the end of the mission the game will also announce that The Treehouse of Horror Update is coming October 1st. Be prepared to be scared.