Some great speeches and interviews with activists and investigators:

First, be sure to check out the various presentations at Ralph Nader's recent conference,
Taming the Giant Corporation


Other Activist Presentations:

Lectures from the Democracy Schools:
Thomas Linzey (of CELDF)
Richard Grossman

The Carnegie Institute's (DC) mission is to promote popular education in science. They sponsor a series of lectures each year. Check out the archives (one I recommend is David Goodstein's lecture on the End of the Age of Oil from 4/2006.

If all of this gets too grim, then go to this interview with Bill Hicks
or this speech by "President Bush" for a change of pace.

Also, for intelligent diversion, try Doug Henwood's radio show,
the archives of which are here.