I will review the business case for using Drupal vs rolling your own code, using our experience rewriting the fourth version of one of our main applications using Drupal.

Topics covered:
- Things you will (likely) need when building a big project
- Things Drupal + community can provide
- Things Drupal does not provide
- Contributing back to Drupal

Anyone else who has something to share about the financial / business benefits of using Drupal is welcome to join in.