I have some cool HDR images that were done manually in Photoshop using a masks. But the last few times, using Raw and then using the Shadow, Highlight, Burn and Dodge tools in Aperture produces a better and more natural looking result. I still bracket, but I bracket to be able to select the optimum exposure to work with, not to produce HDR images. And really, if I can get better results from a single Raw image, maybe HDR is one of those things that was a function of lack of development of digital technology, not something that is going to be always useful.