> > I am interested in presentations or articles that
> > people have written and will allow me to
> > 'lift' their material. I will post the resulting
> > presentation online, free for anyones use.
I imagine you are only looking for English presentations.

Here you find the slides matz used at JAOO
http://www.ruby-lang.org/en/index.html

We have very short English slides
http://approximity.com/ruby/

If you only want some impressive, but
very short examples, look at:
http://www.approximity.com/rubybuch2/node8_main.html

Good luck,
	Armin
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Armin Roehrl, http://www.approximity.com