I started to implement the code in Blender, which allows me to create layers for the images. (Image Layers)
I started from a base created by KWK , began this work for Gsoc2010.
I did not find much news! Also, the last commit in his trunck is August 16, 2010.
My current job is to insert the code created by him in the current build of Blender!
See you very soon with new features!
Best regards, ruesp83