Walking like Spider-Man may not be so far off | Crave - CNET

Walking like Spider-Man may not be so far off | Crave - CNET: "A one-square-inch contraption with millions of holes sized at 1 micron each, for example, could hold more than 15 pounds--clearly far from enough to sustain a human climber, but a big wall shimmy in the right direction."

So could a 5" diameter circle (~20 square inches) hold 300 lbs? That would easily hold most humans!