We were lucky to get into their beta and for the past 6 months been building our site on their platform. Great platform, great team.
This sounds more PaaS than SaaS.
Happy to see some competition enter the market, to keep Acquia on their toes and continuing to innovate.
I find it curious that the Drupal architecture was never succesfully duplicated in another language.
We launched TheFix.com on Pantheon, very early on (eight months ago), and have been really happy with the platform. Pantheon costs them about 20% of the server cluster we would otherwise have recommended.
This is an bigger deal, from a tech perspective, than the TC story implies. Automating Drupal hosting and really solving the developer workflow is a real feat. Most of what Rails or Django has in config files or framework-driven build scripts is stored in the database. This makes staging and deployment kind of a pain.