Virtual Reality is not a domain on which i focus, however, I recognize that VR is at the far end of Milgram's continuum from Augmented Reality so there are interesting developments in VR which can be borrowed for wider application. For example, Virtual Reality has a long history of using 3 dimensionality, from which AR practitioners and designers have much to learn.
I'm particularly attentive to standards which could be shared between VR and AR. The current issue (vol 4 number 3) of the Journal of Virtual World Research is entirely dedicated to the MPEG-V, the standard developed in ISO/IEC JTC 1 SC 29 for Virtual World (ratified one year ago, January 2011).
This journal is the most comprehensive resource I've found on the standard. It is written and edited by some of those leading the specification's development including:
Jean H.A. Gelissen, Philips Research, Netherlands
Marius Preda, Insitut TELECOM, France
Samuel Cruz-Lara, LORIA (UMR 7503) / University of Lorraine, France
Yesha Sivan, Metaverse Labs and the Academic College of Tel Aviv-Yaffo, Israel
I will need to digest its contents carefully. Not much more to say about it than this at the moment!