If you're interested in developing and designing games, here's a great conference for you -  SIEGE (Southern Interactive Entertainment and Game Expo). From their website:

SIEGE’s speakers include leading figures from a wide spectrum of the industry, including leading artists, programmers, designers, writers, teachers and business executives. Other speakers include government figures, experts on computer game violence and social issues, and more.

More information through my colleague's blog post: dougturn's WebLog : Game developers - SIEGE conference in Atlanta is October 5-7