I recently came across a couple of links of relevance to our ESUG panel discussion last year – Ignorance is Not Bliss (slides) (video) – about open-source copyright and licensing.
The first, Can you contribute to an open-source project, is a concise and well-written summary of the main issues around the ownership of software intellectual property.
The second presents the contents of a Fair Use Symposium published in the Journal of the Copyright Society. I haven't really had time to dive into these, but they should provide interesting reading for anyone with questions about what constitutes "fair use" of a Copyright work.
