A government grant paid for this really fun app, in which you smash your food to find out how much sugar, salt, and oil it contains. One nice feature is that you can fill in your own personal information for things like exercise and weight, to get recommendations tailored specifically to you. There's also a free iPhone app.
Smash your Food
This app was displayed at the data.gov booth, where I was told about all the facts I could find at data.gov. Look there for information and statistics from various government departments and agencies, as well as ideas for the classroom.