Anton Kapela and Alex Pilosov gave this talk titled "Stealing the Internet - A Routed, Wide-area, Man in the Middle Attack" at Defcon 16. The talk begins with some background about BGP basics and how it is used to route traffic, then moves on to currently known attacks on BGP and then finally describes the attack discovered by the researchers using which it is possible to MITM traffic on the Internet for any target destination.

The entire video of the entire talk is available here:

http://securitytube.net/Hijacking-the-Internet-using-a-BGP-MITM-Attack-(Defcon-16)-video.aspx (http://securitytube.net/Hijacking-the-Internet-using-a-BGP-MITM-Attack-%28Defcon-16%29-video.aspx)