While browsing for a headset for my PS3 I came across the official Sony one which is now selling for £17.99. A good deal as it was selling for £24.99 for quite some time.
With research, Play.com and HMV are also selling at £17.99 but both places are either out of stock or will take 3-5 weeks delivery. So Amazon is the best deal, currently in stock with free Super Saver delivery!
Great for games such as COD:MW2 which is why I've bought one!