At SymfonyCon Warsaw in December 2013, I spoke with Fabrice Bernhard, co-founder of Symfony service provider Theodo and President of the French PHP Users' Association, AFUP ("Association française des utilisateurs de PHP"), and we compared notes on Drupal, Symfony, and all things open source.
Read the full post and see the conversation video at the Acquia Developer Center: https://dev.acquia.com/podcast/125-fabrice-bernhard-symfony2-and-drupal-working-together-working-better