I thought this links might be of interest: Here is a new MoCAP system that does not use markers on the body – this seems to me to be a revolution in unencumbered motion capture. 

I saw this system at the Organic Motion HQ in NYC last year and was very impressed at the responsiveness  and speed with which it computer the body form within it.Here are some video examples of it in action  Organic Motion data samples and also some discussion of the  biomechanical motion analysis interface 

Optitrack make a cost effective MoCAP system that seems to be reliable and robust, and is portable so makes more sense than say a VICON system for use with dancers in a theatre and for touring a show.

MoCAP example using Optitrack – thought this might be of interest in thinking about what is missing given our Feldenkrais work.