My relation to open source and free software made me aware of the license issues not only on software but also on content. Debian thoughts about the GFDL where one of the first issues I encountered, and also the use Wikipedia does with that license.
Today, I try to make all my writings open content with the GFDL or with Creative Commons. I started with changing the license of all my guides to GFDL and asking other to so in one of my websites: guides.co.il. This is much more noticeable in my university where I send my papers with CC, mention the quotes from wikipedia are under GFDL and so on, while most people don’t even think about licensing their works.
This year I had the opportunity to lecture one of my classes about open source and free software in information science and open content is very related phenomenon with a lot of ties to open source.
Talking about open content and universities – it’s a shame not all content created with public funding is required to be released as public domain or open content…
Anyway – go and open your content. Make it available to evryone.