Wasn't really looking for a keyboard in particular, but came across this and seem to be the cheapest (next cheapest - PCWorld £40.49 collect from store).
Anyway, anyone who's a MacDonald fan will know that they are doing a promotion with Play.com which you can get £1 voucher codes when you buy their meals (not 100% guarantee you will get the voucher code, but very likely), so you can probably get this for £33.99. Also, don't forget 0.5% Quidco (17pence) or 2% from TopCashBack (70pence).
* Flip 3D Key - Experience this dynamic Windows Vista feature by pressing the key to display a 3D overlay of all open windows and cycle through them
* "My Favorites" Keys - Customise these 5 keys to instantly bring up the folders, files, and Web pages you use most.
* Media Keys - Control your media activities with the touch of a button
* Hot Keys - One-touch access to e-mail, Home, Calculator, My Documents, instant messaging, and photos.
* Enhanced Keys - Perform common commands from your keyboard
* Windows Live Call Button - The easiest way to start a video call
* Gadgets - One-touch access to weather, stock quotes, and more
* Zoom Toggle - Easily zoom in and out of digital pictures, maps, and other documents.
* Windows Start Key - Press to launch your Start menu. If you have Windows Vista installed, search your PC or the Web right from there
* Translucent Border and Polished Racetrack - Brings the subtle elegance of Windows Aero to your desktop.
* Comfort Curve with Quiet Touch Keys - Your hands sit more naturally on the quiet, responsive, thin-profile keys for comfortand productivity