Reverse Nested Layouts...

_breadcrumb.html.haml

#breadcrumb
  Home

_navigator.html.haml

-navigator "Sites", "# of Systems", "POC", "System Names", "Edit/Delete" do
  =render Site.saved
  .footer
    =yield

_site.html.haml

.row
  .cell 
    -if @site == site and params[:action] == "edit" 
      .navigator_cell_edit
        -form_for @site do |f|
          =f.text_field :name, :autofocus => true
          .navigator_cell_save
            =f.submit "Save", :class => "remote"
    -else
      =link_to site.name, site_systems_path(site), :remote => true
  .cell 
    =site.systems.count
  .cell 
    =site.poc
  .cell 
    =site.systems.collect(&:coverterm).join ", "
  .cell
    =link_to image_tag("edit2.png", :size => "18x18", :title => "Edit #{site.name}"), edit_site_path(site), :remote => true
    =link_to image_tag("delete2.png", :size => "18x18", :title => "Delete #{site.name}"), site, :confirm => "Are you sure?", :method => "delete", :remote => true

application.html.haml

!!! 5
%html
  %head
    %title
      Blah
    =stylesheet_link_tag 'application', :media => 'all'
    =stylesheet_link_tag 'blueprint/print', :media => 'print'

    =javascript_include_tag 'application'
    =csrf_meta_tags
    =yield :head
  %body
    #header
      =render :partial => "layouts/header"
      =render :partial => "layouts/flash"

    -if content_for? :content
      =yield :content
    -else
      =yield

    #footer
      =render :partial => "layouts/footer"

application_helper.rb

module ApplicationHelper
  def navigator(*columns, &block)
    haml_tag :div, :id => "navigator", :class => "table" do
      haml_tag :div, :class => "header" do
        columns.each do |column|
          haml_tag :div do
            haml_concat column
          end
        end
      end
      yield
    end
  end
end

index.html.haml

=link_to "New Site", new_site_path, :remote => true

new.html.haml

-form_for @site do |f|
  =f.text_field :name, :autofocus => true
  .navigator_cell_submit
    =f.submit "Submit", :remote => true

sites.html.haml

-content_for :content do
  =render 'breadcrumb'
  =render 'navigator'

=render :file => 'layouts/application'