The news that made my day yesterday was that Sun is releasing Java (my favorite programming language) under the GPL. This holds for the (Open) JDK and the mobile Java platform, but also for their Glassfish enterprise application server (which was already available under the CDDL open source license). More information on Sun open sourcing Java in this FAQ and all over the web.
There are even speculations that OpenSolaris might follow the same license change from CDDL to GPL. This would also be awesome. Think of a GNU/Solaris enterprise operating system and the possible cross-pollination between Solaris and Linux.