Pass the Sputnik Boulder like you are going up to the Lower Satellites. Instead of going left up the trail next to the huge wall known as The Wave, go up the right fork of the trail to the base of The Second Flatiron.
Where the trail meets the base of the Second Flatiron, a cube-like boulder reminiscent of a Borg Cube on Star Trek is on your left.
Nanoprobe climbs the overhanging northeast corner and requires a dynamic move off two small opposing slimper pinches into a shallow 2- or 3-finger pocket depending on the size of your fingers. From there, slap for the top and pull over on a thank god bucket. Pure and brilliant, although maybe I'm slightly biased =).