From Kert Peterson's training; 2005. Done as part of CSM training, I believe.
http://agileconsortium.pbwiki.com/f/Lean-Agile-%20Stories%202006-01-30.ppt
5 page PPT to cover stories quickly; CC Pace format
Training for User Stories May23 2006-05-23 ver2.ppt
17 page deck on User Stories.
A Mike Cohn deck on user stories; 72 slides.
A Mike Cohn deck on user stories; 52 slides. Some overlap with the deck above, but many differences.