I'm using lightroom for about 80% of my photo editing. Like the program, but it's that 20% that has to go out to photoshop that is a PITA. I've watched Michael and Jeff's video, very helpful, and I picked up numerous tips from it. What I was most interested in is the tools for doing local editing on the image. Lightrooms weakpoint. The current brush and gradient tools work, but they are clunky, and there is the lack of finess that can be achieved with a curve in photoshop. My workflow in photoshop is to do use adjustment layers, and then mask them and paint in the changes where I want them. I'm hoping for similar tools in future versions of Lightroom. Any hope?
Not sure if this is what you are looking for, however you may want to check this out.
I saw on the OnOne Website http://www.ononesoftware.com/products/perfect-layers/
they where releasing a layers add on called "Perfect Layers 1
This is supposed to work with both Lightroom and Aperture in 64 Bit. It does state you will be able to create layered files in Lightroom or Aperture: http://www.ononesoftware.com/products/perfect-layers/features.html