Hi Eric.

It's safe to assume that your viewers will have seen this, and perhaps
you as well, but the Ruby Doc has a slide series entitled "10 Things
Every Java Programmer Should Know About Ruby"
(http://www.ruby-doc.org/docs/10%20Things%20Every%20Java%20Programmer%20Should%20Know%20About%20Ruby/10things.tgz).

It might prove useful for you insofar as what the author, Jim Weirich,
felt important to convey.  Perhaps it'll help you fine tune your
presentation.