I have the Airport Extreme. Would I be able to use this to get internet onto laptops that are compatible with the device? http://www.amazon.com/IEEE802-11n-W...?ie=UTF8&s=electronics&qid=1242011733&sr=8-10 I have an old PC that doesn't have a built-in wifi chip or adapter, so I want a cheap USB adapter that can receive wifi. I don't know if I can use this with my airport extreme, or if it's only for LAN connections. Thanks!