In addition to the previously mentioned articles on B&H, they also have a great new article on Adobe Lightroom 2. Lightroom is Adobe’s “digital darkroom” software. It has some of the functionality of the venerable Photoshop, but has been reduced to the essentials that professionals use when editing their photos.  I’ve never used the software (I’ve got Photoshop and Bridge), but I know some photography professionals swear by it.