I done some looking around on google to find an alternative way to get a wireless connection on my xbox without spending the ridiculous £60 for microsofts version.
All you need is a laptop/desktop with WiFi & a ethernet (or crossover cable for PC users)
i personally use a macbook and use a cross over cable and everything works perfect if not better than Microsoft's wireless connection. Below is tutorial videos on how to do it for mac and PC, i used the mac one and does seem a bit easier. I have also supplied the crossover cable that i have purchased to get it working which is £2.99 with free shipping from play BARGAIN! ..... ENJOY!
For Mac : (WORKS as this is the one i used)http://www.youtube.com/watch?v=WV4qd1RHmH8&feature=related