Suw has a nice essay describing Lessig's Free Culture and the audio book project that emerged from that. It describes the whole process and really helps show Free Culture in action. It's a longish post, but worth reading, even for those with short attention spans. Her 15 word summary of this essay is:

Suw

For the terminally short of attention out there, here's my Free Culture audiobook essay in 15 words:

Lessig++
RIAA--
Free culture = more creativity
New publishing models
Download, read, buy = sales up
Discuss!