MarvikShop, is not a bridge, but a total revamp of osCommerce to work within Joomla as a Joomla component, it installs via the Joomla! component and Module installers. The MarvikShop Project is 2 years old. Now it's time to share the program with you. With many features available this will be one of the most complete ecommerce solution you need.
Unfortunately you have to wait... a couple weeks when the component comes online. You can see a lot info on the demo shop and in the overview.