FurbyXL writes "With the RIAA roaring to grab peer-to-peer users by their IP addresses, Freenet - fully anonymized production and consumption of content - is gaining renewed attention. Articles in New Scientist, ZDNet UK, Wired and CNET (and here) set a somewhat typical context for Freenets major release 0.52. Significant performance improvements through NIO-based messaging, probabilistic caching etc. should provide increased rest to Chinese dissidents, but may finally wake-up the RIAA's Matt Oppenheim..."
The announcement on the Freenet home page lists several improvements found in the new version: "a new NIO technology that brings improved performance using less CPU and system resources," "Individual nodes are now more efficient," "the speed and routing of the entire network have significantly improved," probabilistic caching, user interface improvements, and more.