I heard that the late 2008 (newest) macbook has a headphone jack similar to that of the iPhone. In short, i heard that you could plug your iPhone headset in and it would send the sound to the headphones but it would also allow the microphone to work while plugged into that same jack. I know that the macbook pro has a line in and a line out but i am wondering if i had heard correctly that the line out actually supports line in aswell. Am i crazy? I can't find anything on this so i might be wrong. If i am wrong then is there some kind of splitter. Just curious really. Thanks.