diff --git a/README.rdoc b/README.rdoc
index 521a72f..c3b5a1f 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -23,6 +23,7 @@ Service implementations include:
 * Quantcast[http://www.quantcast.com]
 * MixPanel[http://www.mixpanel.com]
 * Gauges[http://get.gaug.es]
+* Segment.io[http://segment.io]
 
 == Usage
 
@@ -40,7 +41,7 @@ Add a configuration file (config/analytical.yml) to declare your API keys, like
    development:
    test:
 
-You can add different configurations for different environments. 
+You can add different configurations for different environments.
 
 By default, all the declared analytics modules are loaded. You can override this behavior in the controller.
 
@@ -91,6 +92,29 @@ This can be useful for enabling the console logger optionally in your app, based
       controller.use_console_logger? ? [:console] : modules
     }
 
+You can also configure modules in the controller by passing a hash to the :modules option
+
+    analytical :modules => { :google => { key: 'UA-5555555-5' } }
+
+Finally it is also possible to dynamically specify what modules to use and their configurations, which can come in handy if your site uses multi-tenancy, where every tenant might not wish to use the same modules or configurations for each module.
+
+    analytical :modules => lambda{ |controller| controller.analytical_modules }
+
+In this case we would then implement a method in the controller that could look like this:
+
+    def analytical_modules
+      case current_tenant.name.parameterize
+      when "site-1"
+        {
+          :google => { key: 'UA-5555555-5' }
+        }
+      when "site-2"
+        {
+          :google => { key: 'UA-1111111-1' }
+        }
+      end
+    end
+    hide_action :analytical_modules
 
 == Adding new modules
 
@@ -151,6 +175,7 @@ These fine folks have contributed patches and new features to this project:
 * {Kurt Werle}[http://github.com/kwerle]
 * {Olivier Lauzon}[http://github.com/olauzon]
 * {Chris Ricca}[https://github.com/ChrisRicca]
+* {Thomas Dippel}[https://github.com/dipth]
 
 Thanks guys!
 
diff --git a/lib/analytical.rb b/lib/analytical.rb
index 694e08d..e8c8632 100644
--- a/lib/analytical.rb
+++ b/lib/analytical.rb
@@ -36,6 +36,15 @@ def analytical
           :ssl => request.ssl?,
           :controller => self,
         })
+        if options[:modules] && (options[:modules].is_a?(Hash) || options[:modules].is_a?(Proc))
+          items = options[:modules].is_a?(Hash) ? options[:modules] : options[:modules].call(self)
+          modules = []
+          items.each do |k,v|
+            options[k.to_sym] = v.symbolize_keys
+            modules << k.to_sym
+          end
+          options[:modules] = modules
+        end
         if options[:disable_if] && options[:disable_if].call(self)
           options[:modules] = []
         end
diff --git a/lib/analytical/modules/segment_io.rb b/lib/analytical/modules/segment_io.rb
new file mode 100644
index 0000000..600138d
--- /dev/null
+++ b/lib/analytical/modules/segment_io.rb
@@ -0,0 +1,41 @@
+module Analytical
+  module Modules
+    class SegmentIo
+      include Analytical::Modules::Base
+
+      def initialize(options={})
+        super
+        @tracking_command_location = :head_prepend
+      end
+
+      def init_javascript(location)
+        init_location(location) do
+          js = <<-HTML
+          <!-- Analytical Init: Segment.io -->
+          <script type="text/javascript">
+            window.analytics=window.analytics||[];window.analytics.load=function(apiKey){var script=document.createElement('script');script.type='text/javascript';script.async=true;script.src=('https:'===document.location.protocol?'https://':'http://')+'d2dq2ahtl5zl1z.cloudfront.net/analytics.js/v1/'+apiKey+'/analytics.min.js';var firstScript=document.getElementsByTagName('script')[0];firstScript.parentNode.insertBefore(script,firstScript);var methodFactory=function(type){return function(){window.analytics.push([type].concat(Array.prototype.slice.call(arguments,0)))}};var methods=['identify','track','trackLink','trackForm','trackClick','trackSubmit','pageview','ab','alias','ready'];for(var i=0;i<methods.length;i++){window.analytics[methods[i]]=methodFactory(methods[i])}};window.analytics.load('#{options[:key]}');
+          </script>
+          HTML
+          js
+        end
+      end
+
+      def track(*args)
+        if args.any?
+          %(window.analytics.pageview("#{args.first}");)
+        else
+          %(window.analytics.pageview();)
+        end
+      end
+
+      def identify(id, attributes = {})
+        %(window.analytics.identify("#{id}", #{attributes.to_json});)
+      end
+
+      def event(name, attributes = {})
+        %(window.analytics.track("#{name}", #{attributes.to_json});)
+      end
+
+    end
+  end
+end
diff --git a/spec/analytical/modules/segment_io_spec.rb b/spec/analytical/modules/segment_io_spec.rb
new file mode 100644
index 0000000..042bdca
--- /dev/null
+++ b/spec/analytical/modules/segment_io_spec.rb
@@ -0,0 +1,61 @@
+require File.expand_path(File.dirname(__FILE__) + '/../../spec_helper')
+
+describe Analytical::Modules::SegmentIo do
+  before(:each) do
+    @parent = mock('api', :options=>{:segment_io=>{:key=>'abc'}})
+  end
+  describe 'on initialize' do
+    it 'should set the command_location' do
+      a = described_class.new :parent=>@parent, :key=>'abc'
+      a.tracking_command_location.should eq :head_prepend
+    end
+    it 'should set the options' do
+      a = described_class.new :parent=>@parent, :key=>'abc'
+      a.options.should eq({:key=>'abc', :parent=>@parent})
+    end
+  end
+  describe '#track' do
+    it 'should return the pageview javascript' do
+      @api = described_class.new :parent=>@parent, :key=>'abcdef'
+      @api.track.should eq "window.analytics.pageview();"
+      @api.track('pagename', {:some=>'data'}).should eq  "window.analytics.pageview(\"pagename\");"
+    end
+  end
+  describe '#event' do
+    it 'should return the track javascript' do
+      @api = described_class.new :parent=>@parent, :key=>'abcdef'
+      @api.event('pagename').should eq "window.analytics.track(\"pagename\", {});"
+    end
+
+    it 'should include data value' do
+      @api = described_class.new :parent=>@parent, :key=>'abcdef'
+      @api.event('pagename', {:value=>555, :more=>'info'}).should eq "window.analytics.track(\"pagename\", {\"value\":555,\"more\":\"info\"});"
+    end
+    it 'should not include data if there is no value' do
+      @api = described_class.new :parent=>@parent, :key=>'abcdef'
+      @api.event('pagename', {:more=>'info'}).should eq  "window.analytics.track(\"pagename\", {\"more\":\"info\"});"
+    end
+    it 'should not include data if it is not a hash' do
+      @api = described_class.new :parent=>@parent, :key=>'abcdef'
+      @api.event('pagename', 555).should eq  "window.analytics.track(\"pagename\", 555);"
+    end
+  end
+  describe '#identify' do
+    it 'should return the identify javascript' do
+      @api = described_class.new :parent=>@parent, :key=>'abcdef'
+      @api.identify('id', {:email=>'test@test.com'}).should == "window.analytics.identify(\"id\", {\"email\":\"test@test.com\"});"
+    end
+  end
+
+  describe '#init_javascript' do
+    it 'should return the init javascript' do
+      @api = described_class.new :parent=>@parent, :key=>'abcdef'
+      @api.init_javascript(:head_append).should eq ''
+      @api.init_javascript(:head_prepend).should =~ /window.analytics=/
+      @api.init_javascript(:head_prepend).should =~ /abcdef/
+      @api.init_javascript(:head_prepend).should =~ /analytics.js\/v1/
+      @api.init_javascript(:body_prepend).should eq ''
+      @api.init_javascript(:body_append).should eq ''
+    end
+  end
+end
diff --git a/spec/analytical_spec.rb b/spec/analytical_spec.rb
index 29aedfa..9ebcf71 100644
--- a/spec/analytical_spec.rb
+++ b/spec/analytical_spec.rb
@@ -15,8 +15,8 @@ class DummyForInit
 
       def self.helper_method(*a); end
       def request
-        RSpec::Mocks::Mock.new 'request', 
-          :'ssl?'=>true, 
+        RSpec::Mocks::Mock.new 'request',
+          :'ssl?'=>true,
           :user_agent=>'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 GTB7.0'
       end
     end
@@ -30,6 +30,27 @@ def request
       d.options[:string_option].should == "string"
     end
 
+    it 'should load module configurations from hash' do
+      options = { :modules => { :console => { :some_key => 'rubberduck' } }}
+      DummyForInit.analytical options
+      a = DummyForInit.new.analytical
+      a.options[:modules].should include(:console)
+      a.options[:console].should eq({ :some_key => 'rubberduck' })
+    end
+
+    it 'should load module configurations from a lambda' do
+      class DummyForInit
+        def analytical_modules
+          { :console => { :some_key => 'rubberduck' } }
+        end
+      end
+      options = { :modules => lambda { |controller| controller.analytical_modules }}
+      DummyForInit.analytical options
+      a = DummyForInit.new.analytical
+      a.options[:modules].should include(:console)
+      a.options[:console].should eq({ :some_key => 'rubberduck' })
+    end
+
     it 'should preserve :javascript_helpers option' do
       options = { :javascript_helpers => false, :modules => [] }
       DummyForInit.analytical options
@@ -42,12 +63,12 @@ def request
       d = DummyForInit.new.analytical
       d.options[:modules].should == [:google]
     end
-    
+
     describe 'conditionally disabled' do
       it 'should set the modules to []' do
         DummyForInit.analytical :disable_if => lambda { |x| true }
         d = DummyForInit.new
-        d.analytical.options[:modules].should == []        
+        d.analytical.options[:modules].should == []
       end
     end