Prefer textile over markup because markup doesn't support any tables. bähh.

app/helpers/pages_helper.rb

@@ -1,7 +1,7 @@
 module PagesHelper
 
   def wikified_body(body)
-    r = BlueCloth.new(body)
+    r = RedCloth.new(body)
     r.gsub!(/\[\[(.*?)(\|(.*?))?\]\]/) { wiki_link($1, $3) }
     sanitize r.to_html
     r.to_html

app/views/pages/_form.html.haml

@@ -8,14 +8,16 @@
     %br/
     :plain
       [[interner Link]]<br />
-      [externer Link](http://addresse.net)<br />
+      "externer Link":http://addresse.net<br />
-      *kursiv*<br />
+      h1. Erste Überschrift<br />
-      **Fett**<br />
+      h2. Unterüberschrift<br />
-      * erster Listenpunkt<br />
+      _kursiv_<br />
-      * zweiter Listenpunkt<br />
+      *Fett*<br />
+      # erster Listenpunkt<br />
+      # zweiter Listenpunkt<br />
+      ## Unterpunkt<br />
   %p
-    Übersicht über alle Formatierungen:
+    = link_to "Tabellen, Styling, etc..", "http://hobix.com/textile/quick.html", :target => '_blank'
-    = link_to "Markdown Cheatsheet", "http://packetlife.net/static/cheatsheets/markdown.pdf", :target => '_blank'
 
 - form_for @page do |f|
   = f.error_messages

config/environment.rb

@@ -68,7 +68,7 @@ Rails::Initializer.run do |config|
   config.gem "fastercsv"
   config.gem "prawn"
   config.gem "haml", :version => '>=2.0.6'
-  config.gem 'BlueCloth', :lib => 'bluecloth'
+  config.gem 'RedCloth', :lib => 'redcloth'
 
   # The internationalization framework can be changed to have another default locale (standard is :en) or more load paths.
   # All files from config/locales/*.rb,yml are added automatically.