On the left side of the keyboard you'll find a few function keys. From bottom to top we have the Web/Home, which simply opens up your primary web browser as you'd expect. Gadgets is a Vista exclusive, but I'm confused as to it's actual usefulness. If the windows Sidebar is closed, pushing this button will open it. Mail and Call both open up Windows specific applications, Windows Mail and Windows Messenger. Lastly we have the My Documents button which is self explanatory. The zoom feature is one of the best on this keyboard in my opinion. It explains itself really, but you have the ability to slide it up or down to zoom in and out on a webpage or photo. Many keyboards instead just have buttons for accomplishing this, but a slider makes it feel more natural.
Up top we have the usual slew of media shortcuts including video or music playback buttons. The "My Favorites" keys are shortcuts to anything you want, whether it be a certain file, application or game. The little Star button below these brings up the dialog to set up these keys, which I will touch on shortly.
There are three buttons above the numpad, and though difficult to read in a photograph, they are Calculator, Log Off and Sleep. I am a personal fan of the Calculator shortcut on media keyboards as I reference it often.