Firstly, I'm loving using my new 13" MBA BTO with the 4gb ram. Thought I would put it through a bit of a test to see if I could get the fan to kick in and I managed to do just by running a 1080p video on youtube, and opening all the apps on my dock. CPU usage wasn't running at max but there was a massive rise to what I normally use. Is it normal for the fan to be heard with this kind of usage? And how have others been getting on with their machines when running multiple apps?