Like most people I don't agree with paying for information from EBayers.
Also I dislike paying for adaptors that manufacturers charge a fortune for and then sell for even more on EBay!!!
I wanted to connect my XBox to Live! using my wireless laptop and had heard that this was possible. I searched EBay and low and behold there are people out there selling the info, anything from a quid to a tenner!! Thinking, yeah that'll save me a few quid but I bet the info is out there some where. Quick search on google and, hey-ho, there it was!! Just type into google search " connect xbox 360 to internet using wireless laptop" (or similair!)
Up pops an abundance of links and sites that provide the info for free!!
Go to bimmergeek.com and search "xbox" and a step by step guide is given and works perfectly!! It allows you to connect, join, update, download content perfectly and play on-line!!
Hope that helps anyone who reads this and it'll save you a few quid!!