Here's what the Newtonians have to say about their latest creation:
The Momentum is an off-road guidance trainer designed for runners committed to a more efficient natural running style. It provides intelligent control for all foot types on all types of terrain, from groomed bridle paths to technical mountain trails.
My only concern right now is that I won't be able to get my hands on a pair until mid-summer!
I'll get a review up as soon as possible. In the meantime, you can read more about the Momentum here.