activeresource_vs_oauth.rb

# app/models/person.rb
class Person < ActiveResource::Base
  self.site = "http://api.oauth_protected_site.com"
end

# controller

@people = Person.find(:all)


# OAuth connection

@consumer=OAuth::Consumer.new( "key","secret", {:site=>"http://api.oauth_protected_site.com"})
@request_token=@consumer.get_request_token
@access_token=@request_token.get_access_token

# controller 

@people = @access_token.get('/people.xml')