Here are some resources I found useful (on top of Tufte):

1. Work of Alberto Cairo: http://www.thefunctionalart.com. 2. Searching Pintrest for UI/UX, dashboard, information design related keywords. 3. Work of Ben Fry and Fathom: http://fathom.info. 4. Work of Georgia Lupi and Accurat: http://giorgialupi.net and http://www.accurat.it. 5. Infosthetics Blog: http://infosthetics.com. 6. Work of Gregor Aisch from New York Times: http://driven-by-data.net 7. Information Graphics book from Taschen: http://www.taschen.com/pages/en/catalogue/design/all/04984/f...

The last one is a huge brick with many interesting and/or beautiful examples and it also exists as iBook for about $10!

The above resources contain another set of links to great many sources of inspiration...