The limited edition shoes are up for Pre-Order over on the Waypoint Store. The shoes include UNSC and Halo branding as well as a "Spartans Never Die" inscription.
If any of you bought the Halo 3 Limited Edition console, you'll be thrilled to know you can now buy matching shoes! Just what you wanted, right? The price isn't too bad at $70, which for UK readers is about £70 inclusive of shipping.