Unified Controller Usage Convention ?

Hello,

I was wondering if there is a convention or best practices of using
controllers. I've read the Agile Book, the E-commerce book, the Recipes
book, numerous articles, blogs and viewed some of the available
screencasts, and it seems that everyone treats controllers in a
different way. which leads me to believe that maybe it doesn't matter.

Has DHH or any of the Rails core team identified any conventions on how
they should be implemented, or vocalized that it doesn't matter, or that
it's a personal pref's or a design issue ...

I suspect that this has been discussed before, so if it has, could
someone point me to the blog or paper or whatever ... or just give me
the low down.

Thanks

Matt

Yes they have:
http://www.loudthinking.com/arc/000593.html

Also take a look at the "REST and resources" section on this page:
http://weblog.rubyonrails.org/2006/11/23/rails-1-2-release-candidate-1

You picked a good time to become interested in controller design.

Aaron