From 13 - 18 January, the Electronic Frontier Foundation (EFF) is hosting Copyright Week. Each day is devoted to a different issue, with participating organisations contributing blog posts and encouraging online discussions on a particular theme.
Day 2 was devoted to problems of material in the public domain not actually being publicly available, and included information from the Internet Archive which hosts several projects to address that concern.
[If you haven't tried it - have a look at the WayBack Machine for websites that have otherwised disappeared. See for example the JISC-funded TrustDR project website - content has a Creative Commons licence but no longer has a publicly hosted site.]
Day 3 (15 Jan) is focussed on Open Access, with the proposal: "The results of publicly funded research should be made freely available
to the public online, to be fully used by anyone, anywhere, anytime." One blog post addressing this topic comes from the Creative Commons blog, which makes the point "the fewer restrictions are put on the public’s use of materials, the more swiftly scientific progress".
Links to the continuing discussions will be captured under 6 topics at https://www.eff.org/copyrightweek