Just like the (beware - shameless plug) Mindblue Album Cover Project where students write a biography and design an album cover for a historical, literary or scientific figure you can also have kids create their MySpace or Facebook profiles. This is a great great simple assessment or review activity. Of course you don't have to limit yourself to a person's page, they can always do one for an event, place or concept.
This "Civil War" facebook page from the humor site Holy Taco is a great model of this more abstract approach to the assignment:
I know lots of teachers have been doing this type of project (Lauren represent?) - if you have cool student versions please scan and post as I'm sure teachers would LOVE to see them!