360 built in wifi

Ok, so i played Gears 2 at a friends house, and i absolutly fell in love with the game. Now i want to buy a 360. I just wanted to know if the 20gb or 60gb comes with built in wifi (or both).360 built in wifi
They come with a wired ethernet cable. If you want a offical wireless adapter its 100$360 built in wifi
Sadly they do not. But you can connect them to a wireless router through and ethernet cable or buy the wireless adapter to use WiFi. But they are expensive. It costs $100 for one brand new. I bought one from eBay for $70.
Like everyone said apparently not, so if you want to play your 360 wireless you will have to buy the $100 wifi adapter.