Apple has enabled Web-based samples of music available in the iTunes Store via the iTunes Preview Web site - prior to this, sample music was limited to iTunes itself. Nevertheless, it seems that the overall goal is to increase iTunes music discovery via Web search engines, all of which are now indexing the iTunes Preview Web site. Despite the fact that you can play samples in your browser, the iTunes Preview site pushes you to iTunes whenever possible. follow link
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.
- ExtraBITS for 11 January 2010 (10 Jan 10)
Apple Adds Samples to iTunes Preview Site