We recently developed an e-commerce Drupal site using the popular module, Ubercart. Ubercart is fantastic as an e-commercie plugin for Drupal.  It's miles ahead of anything that's available for Joomla. However, one thing that Ubercart does not do natively is handle SSL (Secure Sockets Layer) pages. These are secure pages needed when accepting credit card payments on a website in order to properly protect and encrypt payment information given by the purchaser. You know you are on an SSL page when your browser address changes from http:// to https:// .