Does anyone know of any usb to ethernet adaptors? I won't lie, I am trying to find a way to have a ethernet connection for my new imac with a different mac number then its internal ethernet card (I'm going to college soon, so I'll leave your mind to speculate on why I am doing this) and this seems like a good way? So do any of them work? or is there any other way i haven't thought of (that doesn't include buying an entire airport station and card)?