I was using Bridge CS5 today, and accidentally hit Command-d. To my surprise, the dialog box pictured below appeared.
I thought this was an awfully nice touch. Instead of just taking over the popular Command-d shortcut, which has been problematic because it is used for different things in the operating system, InDesign and Photoshop, Bridge gives you a choice. The first time you press Command-d in Bridge CS5, you are able to specify what you want the shortcut to do. No need to learn how to use a keyboard shortcut editor. Nice!