This is the P2PU Archive. If you want the current site, go to www.p2pu.org!
Online main resources:
Structure and Interpretation of Computer Programs: SICP full text.
MIT OpenCourseWare.
MIT Video Lectures: Please note that only the torrent links seem to be working.
Berkeley lectures: video and audio.
Other study groups:
Schemers in the San Francisco area.
The Anglo-Celt SICP study group: This is the group from which this P2PU course originated!