There is a very knowledgeable man named Mark S. Miller who puts, "Text by me above is hereby placed in the public domain," at the bottom of his posts. He's been doing it since 2002.
(He only posts on mailing lists, though, AFAICT, where of course it is accepted practice for static text to appear at the bottom of posts.)
If you've been following the announced partnership between LessWrong and Castify, you'll know that we would like to start offering the promoted posts as a podcast.
So far, everything offered by Castify is authored by Eliezer Yudkowsky who gave permission to have his content used. Because promoted posts can be written by those who haven't explicitly given us permission, we're reluctant to offer them without first working through the licensing issues with the community.
What we propose is that all content on the site be subject to the Creative Commons license which would allow content posted to LessWrong to be used for commercial use as long as the work is given proper attribution.
LessWrong management and Castify want feedback from the community before moving forward. Thoughts?
Edit: EricHerboso was kind enough to start a poll in the comments here.