rspec users - Jul 2010 - Beginning writing RSpec with Rails model plugin

I want to write a Rails model plugin using RSpec.  I''m using Rails 3,
Ruby 1.9 and RSpec 2.

I''ve read the RSpec and Rails documentation but haven''t found
any examples of using RSpec in a Rails 3 plugin situation.

Is there a plugin someone can recommend that I can study that would help me set
up the environment and set me on the task of writing code?

Sincerely,
Jose