Chasing Amy (1997)

Question: I've noticed that throughout the movie, the first two fingers on many character's right hand are orange. Most noticeable when Holden sees Banky at the end and in the lesbian bar when Banky is swapping stories with Alyssa. What's the significance of this?

Question: At the beginning of the movie, who is the guy who tells someone he cannot imagine Chow Yun Fat playing Madman?

Question: Holden tells a fan that he likes to think of Bluntman and Chronic as Rosencrantz and Guildenstern meet Vladamir and Estragon. I know who Rosencrantz and Guildenstern are, but who are Vladamir and Estragon?