Take a look at Jeff Schewe's teasing post in a thread about Aperture 2.1 and its dodge and burn utility:

what are you gonna be doing next Wed, April 2nd? (I actually already know what you'll be doing but I can't really tell ya)

Rendering out the raw file to run a Photoshop type plug-in on the gamma encoded file (making a tiff) is NOT the way I want to be dealing with raw files. Dodge/Burn, and optimal output sharpening can/should/will all be done right in the raw workflow. That would be the Lightroom way…