Like Welshbloke said, go homeplug if you can, it's the best of both worlds.

http://www.homeplugs.co.uk/acatalog/XBOX_360.html

^
I know I did and I have not looked back I have a total of 6 now. No fiddling, no passwords*, solid connections, fast, affordable.

* You can assign a password especially if concerned that the electrical ring can be accessed by others. This is normally not the case as the ring normally will terminate on your premises but maybe usefull in a Dorm type situation.

Also with regards to Wifi it does not help that I live in the most densely populated City outside of London.

How about security 1 minute to crack WPA (You need to think about WPA2 now).

Most the people posting in this thread haven't even tried a wired connection and yet are still saying there is no difference. If you had tried a wired connection you wouldn't be posting what you are. That or your flat out lieing for fanboy reasons.

Those home plugs look interesting, I might look into that... I wonder if the ones for continental Europe plugs work well...

Well, your PS3 and Wii should be fine going WiFi, but the 360 adapter royally sucks.

THe problem isnt the solid connection, its the inevitable drops in connection from using wireless tech.

Its all bullshit that the right setup has anything to do with it. I have my PS3/XBOX360(with official adapter) and PC 8 feet from a router that is in the same room. Gaming *can* run smooth, but there will always be packet loss due to how wireless works. Drops will be inevitable, maybe not every single game, but it will happen. I couldnt take it anymore, lag spikes in Battlefront, Counter Strike or Gears screwed me too many times. I just ran some cable to the systems and no problems since. Someitimes wireless is the only option, but if you can do a clean run of wire to your system, always do it.

I have no problems. Currently I'm running fiber optic internet with it. I had no problem with cable internet either.

Isn't there something coming out that is better than WiFi?