I'm getting my MBA 11 (i7) set-up finalized, with a 24" ACD and Apple Keyboard and Magic Trackpad. I don't intend to use it as a dual-monitor setup, just operating the computer in clamshell mode. Two questions: -Is there an overheating problem with the computer in clamshell mode? -Does anyone have experience with a MBA on a BookArc stand (in terms of overheating)? It would have seemed better to have the hinge on top to better vent heat, rather than at the bottom, but certainly more aesthetically pleasing the way they did it. I'd like to save a little desk space. Many thanks.