Sun java2D engineer Chris Campbell mentioned it in his blog a while back, but I haven't seen anything since. I've got a feeling that the JavaFX work is taking priority for the time being:http://weblogs.java.net/blog/campbell/archive/2007/04/faster_java_2d.html
Coming Soon: PhotoComposite
It's not officially approved (or integrated) yet, but I've been working on adding more blending modes to Java 2D, in addition to those already provided by AlphaComposite. Many of these modes come from traditional photography techniques, thus the name "PhotoComposite". Some modes are simple (Add, Multiply) and can be accelerated easily using OpenGL's built-in blending rules, others are more involved (ColorBurn, SoftLight) and benefit greatly from the use of shaders for efficient rendering.