Added amazon web services book search example.

examples/aaws.rb

@@ -0,0 +1,26 @@
+dir = File.expand_path(File.join(File.dirname(__FILE__), '..', 'lib'))
+require File.join(dir, 'httparty')
+require 'pp'
+config = YAML::load(File.read(File.join(ENV['HOME'], '.aaws')))
+
+module AAWS
+  class Book
+    include HTTParty
+    base_uri 'http://ecs.amazonaws.com'
+    default_params :Service => 'AWSECommerceService', :Operation => 'ItemSearch', :SearchIndex => 'Books'
+    format :xml
+    
+    def initialize(key)
+      self.class.default_params :AWSAccessKeyId => key
+    end
+    
+    def search(options={})
+      raise ArgumentError, 'You must search for something' if options[:query].blank?
+      options[:query] = options[:query].inject({}) { |h, q| h[q[0].to_s.camelize] = q[1]; h }
+      self.class.get('/onca/xml', options)['ItemSearchResponse']['Items']
+    end
+  end
+end
+
+aaws = AAWS::Book.new(config[:access_key])
+pp aaws.search(:query => {:title => 'Ruby On Rails'})