20 Minute Presentation on Rails - Need to Impress

I have a 20 minute presentation coming up Tuesday for which I am giving
an overview of Rails to an audience of other developers.

What topics should I cover (or maybe I should do a demo?) to best show
off the features of Rails? What features should I cover?

You know, how about showing the Flickr Search demo (as shown on the
rubyonrails.com site) and explain the steps. Record the process of
writing the source code in advance, then comment on the process. That
or show how scaffolding, MVC and generators can speed up the whole
process.

The presentations must be done Steve Jobs style; with passion and
confidence. Believe in your presentation and "your product". No one
wants to listen to something half-bottomed presentation.