I installed the PowerDVD Software (Cyberlink) with Blu Ray support. Blue Ray uses Java (the BD-J) for the rendering of menues and movie control. I was just curious and searched for Java in the installation folder. You will find the Jars and Zip-File in the [installation]\CyberLink\PowerDVD\NavFilter folder. Blu Ray comes with public API and SDK - so it should be possible to build a application as well. Some programming resources are already available - at the last JavaONE was available in the booth. So if you are a Java programmer and have to decide between Blu Ray and HD-DVD, it should be obvious what to choose. If you are not a Java programmer - just choose Blu Ray :-). You can find release dates for movies here. However some concerts e.g.: Pink Floyd / David Gilmour, and AC/DC are already available (some of the essentials bands for an average Java developer :-)).