If it isn’t already, put the Linking Open Data project on your radar. It’s a grassroots effort to make large data sets available on the web. These aren’t just tarballs sitting in an FTP directory either–they’re URL addressable information resources available in machine readable format. A few weeks ago Joshua Tauberer announced the availability of the US Census as close to 1 billion triples. If you like data and the web the discussion list is a wonderful place to watch these data sets getting released and linked together.