Sites:
Infinite Jest - Big collection of DFW links on the web.
The Howling Fantods - Great DFW site by Nick Maniatis.

Articles & Interviews:
Larry McCaffery - David Foster Wallace interview 1993.
Oregon Voice - An interview with David from 1998.
Salon - An interview with David from 1996.
Stim - DFW interview and audio from 1996.

Reviews :
Brief Interviews With Hideous Men - From Leisuresuit.net.

Other :
William T Vollmann - Another great young American author.