Several people in an earlier post expressed their desire to find a replacement for the Nike Air Streak Ekiden.
Post here if you have found a suitable replacement.
From what I've seen in pictures, the Kantana Racer looks a lot like the Ekiden. My guess is that Nike had a great shoe (Ekiden) and decided they weren't getting enough $$ for it. So they discontinue it, and bring it back with another color & name, and increase the price.