These three quick interviews at Comic Con with About.com are pretty good.
First is Josh Brolin: He makes mention of the 3 incarnations of Jonah Hex with one looking like "a 70's porn star", no doubt a reference to the futuristic Hex book.
Next is Michael Fassbender: Interviewer Rebecca Murray asks if he drew any inspiration from the books. He doesn't (probably since his character, Burke, doesn't appear in any books) but makes mention of a bowler. The most prominant bowler wearer was Ned Landon.
Finally is Jimmy Hayward & Megan Fox: Hayward is revealing himself as a fan of the book and this bodes well for the movie. Megan? Well, I've never seen a film with her in it and every interview she is saying the same thing over & over & over & over again. Here, I'm not so impressed.