foo.rb

# using memcache hosted on other-than localhost:11311 - needs better documentation

Rails::Initializer.run do |config|
  config.cache_store = :mem_cache_store, '72.14.x.y:11311' 

  ActionController::Base.session = {
    :key         => '_foo_session',
    :secret      => 'secret',
    :memcache_server => '72.14.x.y:11311'
  }
end