The "Euston Manifesto" is a document produced by a group of interventionist left-wingers in the UK who think that some on the left have lost their way over the case for universal human rights. It has been widely discussed in the media, but I hadn't noticed that it has a section on intellectual property (via Open Rights Group):
14) Open source.
As part of the free exchange of ideas and in the interests of encouraging joint intellectual endeavour, we support the open development of software and other creative works and oppose the patenting of genes, algorithms and facts of nature. We oppose the retrospective extension of intellectual property laws in the financial interests of corporate copyright holders. The open source model is collective and competitive, collaborative and meritocratic. It is not a theoretical ideal, but a tested reality that has created common goods whose power and robustness have been proved over decades. Indeed, the best collegiate ideals of the scientific research community that gave rise to open source collaboration have served human progress for centuries.