All sorts of resources exist, and I would recommend the impatient to go to RAWilson Fans (permanent link on right) where you can find links to just about all RAW-related material online.
I came across this site today, which offers tape cassettes, videos, CDs etc of Bob talking in various contexts on a wide range of subject. Sound Photosynthesis.
I enjoyed the obit/reminiscence of Jesse Walker from Reason magazine online.
Interview with the Positive Atheism site. etc, etc.