In an interview with BBC Radio 1, Matt Damon talked Rounders and did a fantastic impersonation of John Malkovich in one of the most famous scenes.
Enjoy! And thanks to Remko for originally posting a link to it.
Then, Matt went on the Rich Eisen show where he talks about the Rounders sequel. We really hope this pans out! (Rounders talk starts at about the 16:30 mark)