Perfect Layers allows you to combine multiple images from Lightroom, Aperture or Bridge into a single, layered file (ie, adds Layers functionality to these apps!).
The Perfect Layers Public Preview will expire on June 30th, 2011. The final version, 1.0, will be available for purchase in mid-2011. At that time, Perfect Photo Suite 5.5 owners will receive a free product update that will include Perfect Layers 1.0.