Pre-order both the new MS Speed Wheel and Forza 4 from Amazon and 11% (£7) is knocked off the price at checkout.
Amazon already have a great price on F4 (£37.99), so with this deal you are essentially getting the game for £30.99 (or the wheel for £32.91, whichever floats your boat!).
A good saving for anyone who's after both (like me!).
Remember to choose the Free Delivery option for the £70.90 price :)