You have an account on AiGameDev.com, but it looks like you have not yet signed up as an INSIDER (free). It’s a one click process, see below:

Insider Teaser
PathOfExile_Act3.crop

PATH OF EXILE Interview, Game/AI Conference Slides

Alex J. Champandard on October 20, 2012

Watch upcoming interviews on racing logic in DRIVER: SAN FRANCISCO, constraint-based level generation, and download slides from Game/AI Conf. 2012.