Boy, that rumor about the AppleCD 300 being in short supply was a bum steer (financially disadvantaged, reproductively challenged male bovine?). Numerous people wrote to tell me that they had seen units around, and I have one sitting on my desk right now. Oh well, can't always trust those Apple rumors.
Option-click to Hide Apps Quickly
This trick has been available in the Mac OS for years, but many people still don't know it. If you have too many windows cluttering up your screen, you can hide specific ones easily as you work. When you're in any application, hold down the Option key and click on another app's window, on the Dock, or in the Finder to switch to that other app and simultaneously hide all the windows in the previously current app.