If i remember correctly, at one time i saw a page somewhere about how to use a wireless router as a wireless card connected via ethernet to the 360, but alas, i had checked again a couple of times later after i purchased my system, and i can't find it.

if anyone knows a link, it could be VERY helpful for a lot of people

 

What you're looking for is a wireless bridge, e.g. this one:
http://www.amazon.com/Linksys-WET11-Wirele...e/dp/B000066JQU

You simply connect the bridge device to the ethernet port of your Xbox, then you can join wireless networks.

Personally, I'm using an old Linksys wireless router with OpenWRT installed to connect my living room devices to the DSL router upstairs. OpenWRT has bridging capabilities.

A Fon Fonera might also be interesting, because it's very cheap and supported by OpenWRT as well. Of course you can also buy a wireless bridge instead of building it yourself, but where's the fun in that?

 

Lol, I threaded a ethernet cable all across the walls in my room

 

I use a router from the Linksys WRT54G line (WRT54GL in my case) with DD-WRT flashed onto it and configured as a wireless ethernet bridge when I want to do wireless with the 360 or any NIC equiped device for that matter. Cheap, performs far better, and plenty more uses. Plus a fun little project to toy with.

 

Yes, a wireless bridge is definitely the way to go, I'd recommend a hacked La Fonera due to its small size - it's practically perfect for wireless bridges. DD-WRT is an open source Linux-based firmware for routers. It has a huge amount of options which can be used to make a router do just about anything you can imagine a router doing. I'm actually running a Linksys WRT54G with DD-WRT as the wireless bridge for this computer, and my real router is a DD-WRT'd WRT54GL which has dual access points with security between them (WPA for computers, WEP for DS) and an XLink Kai daemon for my Xbox to play games online.

 

lol get a ps3 then, it's built in and FREE

 

I realize you're in the UK but Dell has this pocket router that has a wireless bridge mode ($40):
http://www.redflagdeals.com/forums/showthread.php?t=584738
The nice thing about it is that it can be powered by the 360's usb port and it's tiny.

Had I had known this I wouldn't have modded my Linksys router WRT (also $40) with dd-wrt to turn it into a bridge.

 

well it is much less than you will be spending when you buy all those accessories for your xbox lol

 

I wanted to hack a router to keep from paying Microsoft $90 for that wireless adapter but I didn't know where to begin lol. So I just grabbed a set of powerline ethernet adapters off ebay for $35 and have been gaming ever since. Take that Microshit!!!