My MS Natural Keyboard died after over perhaps four years of constant use. I was very fortunate in that I was able to borrow a friend's keyboard for a few hours and then another friend actually gave me the Natural Keyboard Pro.

Here is some more information from the MicroSoft site on the keyboard:

Internet Hot Keys
Internet hot keys allow users with Internet access to launch a browser and surf the Web directly from the keyboard. Internet hot keys include Back, Forward, Stop, Refresh, Search, Favorites and Web/Home.

Multimedia Keys
Multimedia Hot Keys give users the power to control music CDs and PC audio and video directly from the keyboard. Multimedia Hot Keys include Mute, Volume Down, Volume Up, Play/Pause, Stop, Previous Track, Next Track and Media. Click here for a list of compatible media players.

E-Mail Hot Key
Open your e-mail program to check messages with a single keystroke — that's all it takes to access your electronic mailbox.

Custom Hot Keys
My Computer and Calculator Hot Keys give you quick access to these popular Windows features. Or, IntelliType Pro software enables you to customize these Hot Keys to launch your favorite programs, documents or Web site.

Sleep Hot Key
The Sleep Hot Key suspends your PC and lets you resume work later-without having to restart your computer.

2 USB Ports
Two USB ports on the Natural Keyboard Pro let you plug a USB device directly into your keyboard. No more searching for the USB port on the back of your PC!

Ergonomic Shape
The Natural Keyboard Pro allows you to place your hands, wrists, and forearms in a natural, comfortable position.

Control Key Shortcut Labels
Never forget shortcut key combinations again. Common CRTL key shortcut combinations for tasks such as cut, copy, and paste are clearly labeled for easy use.

Oh my. This node was voted down, perhaps because I spoke favourably of MicroSoft. But actually, I was speaking of a gift I am grateful for. My other keyboard lost its shift key and so I couldn't even ask a question without typing 'there should be a question mark here because it is a question'. (And I had to use ' instead of ( because I couldn't type (, only '. But now I can. I think that's much better.)