This morning I found a very fun little project at classtools.net called Twister. The concept behind Twister is that you write a "tweet" that a historical figure might have said. They have to use the figure's real nickname or make up a believable nickname for that person. There's a perfect opening for talking about internet safety. Then they add the person's real name and a 140 character statement that the historical figure might really have said. Then also have to add a plausible date for the tweet which requires a little bit of research. The site adds an appropriate background automatically. ***PLEASE NOTE*** that although this site is intended for classroom use it's not all kid friendly so if you're just browsing through their examples you should pre-screen them before showing students.
Here's one I did for my good buddy Jaques Cartier.