The most beautiful interactive animations ever made are Vector Park, Levers, Acrobots, and now Feed the Head (which just consumed most of an evening for me and Becka).

It's not exactly a secret but neither is it obvious that the author of these is Patrick Smith, a graphic artist in Brooklyn who's best known for his work on The Ganzfeld(*).

(* for more Smithy goodness, let your mouse wander over the title graphic on the Ganzfeld home page)

I finally found his website, with good paintings on it. And, damn, now he's got a picture blog, which includes some pencil sketches for his animations; given how precise his stuff is, it's kind of great that the sketches are so sloppy and lively.