racers have had this idea for a while it looks like, vist (4frnts binding maker) makes a SpeedLock TT plate (one example) that you can mount forward or backwards depending on conditions.
the pins used to hold them in the the plate.
i wonder if 4frnt will start intergrating these holes into thier skis for "quick mount" abilities with their bindings. but who know if that many holes would work on a ski with out weaking the ski. and how would you mount other bindings with that many holes interfearing.