I presented on RESTful routing last night at the Silicon Valley Rails group. I stepped through some code showing how to use scaffold_resource, set up nested resources using REST, use the new named routes, and use responds_to to return information in different formats (HTML/XML/JS/JSON). I also talked about the motivations for embracing RESTful design.
The slides to this and other presentations I've given are here.
Thanks to everyone who came and listened and participated in the REST discussion!