Was £42.49 from the same site and has been reduced again. Brill piece of kit, makes a huge difference when streaming and downloading on your 360.
*NOTE* - It does actually still say £42.49 on the home page however once you go on the item page it changes to £41.99 and stays that way throughout the checkout process.
With increased speed, range and wireless security features (Compared to Xbox 360® Wireless Networking Adapter; supports WPA2 security protocol), the Xbox 360® Wireless N Networking Adapter is your fastest connection to Xbox LIVE. Seamlessly download or stream HD movies, TV episodes, and games from Xbox LIVE Marketplace in full 1080p and 5.1 surround sound from anywhere in the house (Range up to 2x that of a/b/g networks). Compatible with a/b/g/n networks, the compact design fits easily onto the back of your console or offers the flexibility of off-board placement.
The Xbox 360® Wireless N Networking Adapter is ideal for:
Streaming movies, videos and music from the Xbox LIVE Marketplace
Simultaneous downloads, voice and music
Larger homes and multiple rooms
Congested wireless environments
Dense housing, multiple wireless networks
Multiple HD videos and lag-free network gaming