This spring a colleague in my department and I collaborated on a project for our AP US and AP Government students who were in different days and periods to turn in an amazing project on Medicare, Social Security and the debt.  The kids who an amazing array of digital tools and put it all together using Google Docs.  George Mason University just wrote about it on their Teaching History.org Digital Classroom site which you might want to visit as there are many lessons showing how teachers have integrated technology into the classroom.  Our write-up has links to our actual assignment as well as much of the student work product.