I'm looking at buying a new macbook air and running it connected up to a LCD and in clamshell mode. I also use my Macbook Pro in clamshell mode. To keep things cool, I keep a small magnet sitting over the lid sensor (this is located just below the right speaker). This fools the macbook Pro into thinking the lid is closed, when it is really wide open. Thus, I can wake and sleep my laptop normally with it connected to a monitor, but with the lid wide open (excellent air cirulation and heat disipation). I'm surprised very few people know of this trick - I've been doing it for years. So, my question: Is there is a magnetic lid sensor on the Air like on the Macbook Pro?