Personally, I'm suprised that Push or anyone else haven't marketed 'matched' fork and shocks, where a fork's damping and spring curve are tuned to match (as closely as possible) a rear shock.
For example, take a popular frame like a Turner 5-Spot and then offer a tuned Pike & Pearl that have similar spring rate curves and damping curves. Of course, the shock would have to factor in the changes in leverage ratio throughout the travel, and the rider weight would be a part of the equation.
Currently, you can buy a tuned fork and/or a tuned shock, but not necessarily made to match each others' damping/spring characteristics. They offer matched sets for autos, like Eibach Pro System, so I don't know why they could do a similar thing for bikes. The major difference is the fact that the Eibach Pro System has a fixed automobile weight, where as the bicycle/rider weights would have to be customized.