look at these plugins

http://www.longtailvideo.com/addons/plugins/137/SlideSync-(Beta)?q=

http://www.longtailvideo.com/addons/plugins/138/SlideScroller-(Beta)?q=

still primitive but IMHO a good start. :)

update:

http://www.learningapi.com/jw-player-plugins/slidesyncslidescroller-example-page/

using this would involve extracting screenshots of the slides to be included as images...

but loosing the slides at fullscreenmode is disapointing ...