[SKMDC]

He just wrote "What's New Pussycat". (he didn't direct it) In the documentary that preceded the marathon last night (the b&w film you saw was the above mentioned Stardust Memories) he said that he was so disappointed with how Pussycat turned out that he decided then and there that only he would direct anything he would write in the future. He never had that idea for a career path until then.
Another thing he mentioned in the documentary was that Sleeper was meant to be a silent film, the idea being the people in the future had lost the need for speech. He changed his mind (although many of the silent gags remain) because he didn't have Chaplin's physicality to pull it off for a whole movie.

ThuhFreak, he's been doing that gig at the Carlyle over thirty years! I saw him play in the early eighties. In fact he wasn't at the Academy Awards to get his Oscar™ for Annie Hall because he was playing that night.