or use a wireless ethernet bridge like i do.
much cheaper than an official wi-fi adapter, but just as effective.
im not sure if the device you're talking about is one of those, an 'adapter' would generally be sued to adapt something, so im not sure what you need. but a wirelss bridge works fine.
well from the looks of it a wireless bridge cost as much as the adapter.i dont have any wireless devices just my router,the thing im talking about is a wireless n dongle/adapter the thing you use when you computer doesent have a wirless pci card. it goes in the usb port i know you can hook your 360 up to a laptop to make it wirless seen it done on youtube..ps im trying to use my routers wireless n ability...