Well, interesting concept, but it takes the passive cooling approach over the top IMO. There is only so much that can be done passively, and beyond that you face rapidly diminishing returns. The whole contraption is a tribute to that process.
Think of how much better you could cool your system with watercooling, or active cooling... heck, even with just *some* airflow. Fans are not the devil, as long as you keep the breeze modest. And it's beyond doubt that even a small air movement could offer huge improvements over passive solutions.
To wit- you could hook up your cpu, nb and vga with a waterblock, effectively cooling the bulk of the system. The rest could be dealt with by small passive sinks only. Then add a modest pump (say eheim 1048), a good sizeable heatercore and all with solid 1/2" ID, and all you'd need is a 40CFM supersilent 120mm fan, possibly a 120x38 on 7v for best specs.
Combine that with a smart PS like a Fortron 350 that has only 1 silent 120mm as well and you've got the whole system
properlycooled, at the expense of two almost inaudible fans and a pump. I bet you'll still hear your harddisks over that.