I just picked up Mean magazine today. It contains an interview with Paul Thomas Anderson. It's a really good read as he talks about all sorts of stuff from "There Will Be Blood" to some of his guilty pleasure incluing "Bad Santa". I thought that was rather interesting. I also thought it was interesting when he was asked if he still thinks "Magnolia" is the best film he has ever made. The answer was purely silence. I guess you can take that a couple different ways.
Mean magazine costs about six dollars, but I think the price is worth it especially for Anderson fans.