Forum Moderators: phranque
you might also want to look at some of the stuff written by various illusionists ...it is relevant to the field of misdirection of an audience during the performance of card tricks and illusions generally..even clothing ..
Some military and sports work done on the subject too from whence came "power shoulders" ..on joan collins...!
If you haven't read "The Naked Ape", "The Human Zoo", and "Bodytalk: The Meaning of Human Gestures" by Desmond Morris do so. As said, the starting point for everyone else.
The best "resource" I've found is Harvard Business School Working Knowledge [hbswk.hbs.edu] website. Free education from Harvard!
Otherwise, I have to echo the others here advise Morris's works.
[Hawkgirl, I hadn't run across that one before, have to hunt it up (*sigh* Another trip to Amazon.... which wouldn't be a problem AT ALL were I only independantly wealthy!)]