ORG is a grassroots organization in the UK that fights to preserve your rights online. Here is their latest position on retroactive copyright extension for performance rights.
The video is simple and to the point. What I like most about ORG is that it is member driven. It is not just lawyers or academics leading a herd, it is members driving the fight for Access to Knowledge.
I wish the US had a similar member driven organization. EFF, Public Knowledge, Public Patent, Free Culture and CC are each great orgs, but none of them have strong coordinated action from members that is supported by a national infrastructure the way that that ACLU does. FSF is the closest I can think of, but very they have a focused limited scope software. This is a topic though for another post. I strongly encourage people to check out ORG!