Added more information about inputs :for in README.

Signed-off-by: Justin French <justin@indent.com.au>

README.textile

@@ -14,7 +14,7 @@ One day, I finally had enough, so I opened up my text editor, and wrote a DSL fo
       <%= form.input :body %>
       <%= form.input :section %>
       <%= form.input :publication_state, :as => :radio %>
-      <%= form.input :author %>
+      <%= form.input :category %>
       <%= form.input :allow_comments, :label => "Allow commenting on this article" %>
     <% end %>
 
@@ -25,6 +25,11 @@ One day, I finally had enough, so I opened up my text editor, and wrote a DSL fo
       <%= form.input :url_title, :required => false %>
     <% end %>
 
+    <% form.inputs :for => :author do |author_form| %>
+      <%= form.input :first_name %>
+      <%= form.input :last_name %>
+    <% end %>
+
     <% form.buttons do %>
       <%= form.commit_button %>
     <% end %>
@@ -151,13 +156,26 @@ If you want to customize the label text, or render some hint text below the fiel
   <% end %>
 </pre>
 
-Nested forms (Rails 2.3) are also supported:
+Nested forms (Rails 2.3) are also supported. You can do it in the Rails way:
 
 <pre>
   <% semantic_form_for @post do |post| %>
+    <%= post.inputs %>
+
     <%= post.semantic_fields_for :author do |author| %>
-      <%= author.inputs %>
+      <%= author.inputs :first_name, :last_name %>
     <%= end %>
+
+    <%= post.buttons %>
+  <% end %>
+</pre>
+
+Or in the formtastic way:
+
+<pre>
+  <% semantic_form_for @post do |post| %>
+    <%= post.inputs %>
+    <%= post.inputs :first_name, :last_name, :for => :author %>
     <%= post.buttons %>
   <% end %>
 </pre>