In http://orgmode.org/worg/org-tutorials/non-beamer-presentations.html#sec-3 the 'here' (emacs code available here under Code and usage for org-export-as-s5) points to http://gitweb.adaptive.cs.unm.edu/org-S5.git/blob_plain/HEAD:/org-export-as-s5.el (where theres nothing about emacs/org mode) Should probably point here https://github.com/eschulte/org-S5??