One of the feeds that I follow on Twitter is from Pixar, the wonderful people who brought us Toy Story 3. Understandably, a large amount of the recent stuff has been promotion for the film, but who can blame them! However, they did retweet an entry which had a link to a site called
Letters of Note, which turns out to be rather fun.
The link in question was to a letter written by Pete Docter (bigwig at Pixar and director of Monsters Inc and Up) in reply to a piece of fan mail. It's great - have a look
here.