TRENDnet Wireless-N Gaming Adapter for $24.99 shipped.  Here is a screenshot for your reference.  It connects game consoles, including Nintendo Wii, Xbox, Xbox 360 and PlayStation 2 and 3 to a 802.11b/g/n wireless network for playing online or connect multiple consoles to play head-to-head.  Most places have it for about $42 or more.