I really enjoyed this TED talk that talks about how looking at data can help identify an overlooked problem. <a href="http://www.ted.com/talks/ben_wellington_how_we_found_the_worst_place_to_park_in_new_york_city_using_big_data?language=en#t-503346" rel="nofollow">http://www.ted.com/talks/ben_wellington_how_we_found_the_wor...</a>
Moritz Stefaner is on my all-time toplist: <a href="http://truth-and-beauty.net/projects/emoto" rel="nofollow">http://truth-and-beauty.net/projects/emoto</a>