I have been seeing tv ads on The Learning Channel for a film narrated by David Crosby called "Stand Up And Be Counted". You can read about it at discovery.com. The link is on the left hand side of the discovery home page. Here is a bit of what it says:

"Stand and Be Counted North American Premiere, Monday and Tuesday, August 21 and 22, at 9 p.m.

TLC and David Crosby, an outspoken voice for social change, are presenting the four-hour Stand and Be Counted, which traces the evolution of musical activism from the nonviolent protests for civil rights to George Harrison's pivotal 1971 Concert for Bangladesh to the recent annual stadium concerts in support of a free Tibet. Rare, in-depth interviews with musicians and activists, including Sir Bob Geldof, Carlos Santana, David Crosby, Harry Belafonte, Jewel, Joan Baez, Peter Gabriel, Sting, Tracy Chapman and Willie Nelson, among others, reveal their passions and motivations for organizing and participating in events for change. The documentary features unique footage of benefit concerts that transcend musical genres, political beliefs and ideological passions: 1985's Live Aid (still the largest international benefit concert ever staged); Amnesty International concerts; the No Nukes concerts; Farm Aid concerts; and other politically and socially motivated rallies and benefits.