Some lessons and insights about Augmented Reality/Pervasive games are described in this document by Bruce Thomas, Wayne Piekarski, Benjamin Avery and Joe Velikosvky. It's actually an overview with some results that concerns AR Quake, 3 Moon Lander and 3D Sky Invaders. What is interesting is that they deal with gameplay/design issues as well as human-computer interaction topics (like hardware weight or interfaces). There are some relevant information, especially with regards to feasibility issue (difference between indoor/outdoor platforms for instance).
This document is produces by a-rage (an acronym for : Augmented Reality Active Game Engine), a spin-off company from the University of South Australia. The purpose of A_Rage is to commercialise outdoor augmented reality gaming technology developed at the Wearable Computer Lab at the University of South Australia.