That one is predated by Reebok's Timetanium. Some MIT Mathematician made a formula and the shoe design is pretty much based on his equation. I remember an old friend getting one in his mailbox to sample the shoes. I was looking for his article he had when he used to do graphic design for both Gizmodo and Engadget.
The other one I like, although not linear based, is Josh WisDumb x NB 574 Artist Edition.
