Hey guys, I just have a tip I'd like to share to y'all. I normally plug my mba into a dell 24" external monitor (1920x1200) at home. Whenever I do this however, the system heats it up and the fans spin up to max. Somehow the graphics processor in my mba is having a hard time driving both the internal and external displays. What I realized is that I don't really use the internal display when I'm connected to my 24" anyway, so if I could just disable the internal screen it would free up some needed vram and overall cool down the system. However, the hard part is that there's no obvious way to do this for any mac notebook. Well, I ran into this tip here that basically allows me to do exactly what I want to do: http://www.macosxhints.com/article.php?story=20070504003442646 Basically all you have to do is close your lid, plug in the power and the external monitor adapter, then plug-in a usb peripheral (I usually plug in a usb hub when I'm sitting at my desk anyway). Plugging in the usb will wake the system. After you re-open your lid, the internal monitor will remain off. Therefore, your mba will be driving only your external monitor at this point. Now while running my external monitor, my mba is staying 5-10C cooler than before (around 55C cpu temp under light usage). So, if you are having heating issues while having an external monitor plugged in and you don't mind turning the internal off, then try this tip out!