Syncing content between stage and prod
Today I've discovered this site: http://www.drupaldeploy.org:


  A next generation comprehensive yet easy to use content staging
  solution built for Drupal developers and end users


There are several modules that work together, the "base" module should be Deploy:


  The Deploy module is designed to allow users to easily stage and
  preview content for a Drupal site. Deploy automatically manages
  dependencies between entities (like node references). It is designed
  to have a rich API which can be easily extended to be used in a
  variety of content staging situations.


On drupaldeploy.org you can find related modules.