Drupal and magento integration

In this project we have to take a Drupal installation and a Maganto instillation and integrate them both with single login and such. Drupal will be used for content management and the front face of the website including blogging and articles while the maganto will be used for the shopping cart system. We would require the design that we provide to you to be very seamless and the general user should not be able to tell exactly the different between the entire site when they are using the CMS or the eCom. We will provide the PSD of the design itself ofcourse but you would have to integrate it with the entire system. I also want to integrate social media with the website.