Some links you may find useful...
General information about the Alexander Technique
STAT is the main professional body for Alexander Technique Teachers in the UK. This site is an excellent starting point for learning more about FM Alexander and his discoveries, about the teaching of the Technique and about research into its uses.
This is a site maintained by Robert Rickover in Canada and is an excellent source of general information about the Technique.
AmSAT is the largest professional body for teachers of the Alexander Technique in the United States.
Mouritz specialises in books about the Alexander Technique.
A list of properly conducted clinical trials and research papers on the Technique.
This is on a site called My Ergonomic Chair and it's a neat collections of, well - lots of reasons to try the AT. It also gives links to research supporting these.