Media companies like the NY Times, The Guardian, ProPublica, La Nacion in Argentina and the Texas Tribune, among others have set up vast data-driven journalism archives, dataviz tools and interactives on their websites. These are great sources of ideas and inspiration.
The Guardian has its own world government datastore http://www.guardian.co.uk/data
La Nacion’s datawork is cataloged here:
Aron Pilhofer discusses the use of data in the New York Times
Check out the free Data Journalism Handbook here:
Journalism in the age of data – is an interesting series of lectures posted by Stanford.edu
(this list was compiled by Knight Center for Journalism in the Americas)