Drupal in the Cloud - Research Paper

hi, i'm currently researching different drupal cloud hosting technologies for a paper for university. attached an initial overview of the paper's contents as pdf presentation and would like to know if you have any remarks to such a paper.

• which topics would you like to know about?
• can you think about good metrics in order to compare SaaS solutions like Drupal Gardens and Buzzr or PaaS solutions like Pantheon, DevCloud and Microsoft Azure?
• more input welcome

thanks for your replies, i'll keep this post updated as the paper progresses.