<%= hidden_field_tag "return_to", params[:return_to] if params[:return_to] %>

<label for="edition_assigned_to_id">Assigned to</label>
<%= f.collection_select :assigned_to_id, User.order_by([[:name, :asc]]).all, :id, :name, :prompt => "Select someone" %>

<%= f.input :title,
      :input_html => { :class => "span7", :autofocus => true, :disabled => @resource.published? } %>

<%= f.input :alternative_title,
      :label => 'Alternative title',
      :hint => 'Use this where longer title is needed for SEO purposes',
      :input_html => { :class => "span7", :autofocus => true, :disabled => @resource.published? } %>

<%= f.input :overview,
      :as => :text,
      :label => 'Meta tag description',
      :hint => 'Some search engines will display this if they can&rsquo;t find what they need in the main text',
      :input_html => { :class => "span7", :rows => 3, :disabled => @resource.published? } %>

<fieldset class='form-horizontal'>
  <%= hidden_field_tag "return_to", params[:return_to] if params[:return_to] %>

  <div class="control-group">
    <label for="edition_assigned_to_id" class="control-label">Assigned to</label>
    <div class="controls">
      <%= f.collection_select :assigned_to_id, User.order_by([[:name, :asc]]).all, :id, :name, :prompt => "Select someone" %>
    </div>
  </div>

  <%= f.input :title,
        :input_html => { :class => "span7", :autofocus => true, :disabled => @resource.published? } %>

  <%= f.input :alternative_title,
        :label => 'Alternative title',
        :hint => 'Use this where longer title is needed for SEO purposes',
        :input_html => { :class => "span7", :autofocus => true, :disabled => @resource.published? } %>

  <%= f.input :overview,
        :as => :text,
        :label => 'Meta tag description',
        :hint => 'Some search engines will display this if they can&rsquo;t find what they need in the main text',
        :input_html => { :class => "span7", :rows => 3, :disabled => @resource.published? } %>

</fieldset>

Use form-horizontal in the title-etc partial
Use form-horizontal in the title-etc partial

Because nicer
