Marco Arment the Chief Scientist of Tumblr, Inc. (they host this site, be nice to them). How did you get involved with David and Tumblr? Davidville was still a consulting company, and he wanted to see my work, so he subcontracted a feature from a client project to me. He liked my code and working with me, so he offered me the job. I waffled for a while, as I was deciding between Davidville, Amazo