Best opensource e-shop engine to sell virtual goods

[fatpages]

Hi All,
can anyone suggest the e-commerce engine which is well adopted to sell virtual content (e.g. downloadable content, subscriptions, promo codes)?
I tried Virtuemart for Joomla and Ubercart for Drupal, but they both are really limited and don't provide the "off the shelf" flexibility for virtual goods.

[pingvin]

Hope its not to late for help, but try magento. Its pretty good.

[dennishall]

Zen Cart allows for downloadable files to be avaiable after purchase, and also allows for no shipping and no taxes.