Of possible interest only to me, but here's a cool blog devoted to letterhead. It get my design geek on. Lots of historically interesting (even if not so designy) things there. Includes many Disney letterheads during the promotion of their classic movies. (Grokked form Jay Lake who linked to the Hindenburg Letterhead).
An old article form Patrick Rothfuss on deadlines, success, and the process. With cartoons. It's form last February, but I just found it (grokked from Anne Zanoni).