It's pulled in on the bottom - but the fan sits on the right hand side of the bottom. The exhaust is on the right hand side. Some folks have said it is a bit annoying when they are using a mouse...I never use a mouse with my notebook, having adapted to the trackpad quite well.
I find it easy enough to place the laptop so there is plenty of airflow (in and out). For example, right now I'm sitting with my legs crossed and the laptop is resting on top of my leg, with the right side completely open to air flow.
The laptop weighs 6.5+ lbs, but the weight is nicely distributed, and the fact that it is thinner in the front also makes it comfortable to use on your lap.