http://blogs.msdn.com/johnmont/archive/2008/03/20/it-s-about-the-data.aspxPopfly , a mashup tool, depends on three things: data that is simple to access programmatically, interesting, and available under terms that enable users to work with it. As with most software endeavors, you can pick two. The government has a huge amounten-USCommunityServer 2.1 SP1 (Build: 61025.2)