[nateaune]

Tom Preston, the co-founder of Github had some interesting things to say about the benefits of open sourcing almost everything that the company creates. http://tom.preston-werner.com/2011/11/22/open-source-everyth...

But a deeper question is what problem are you trying to solve with another PaaS product that is not already served by the likes of Heroku, Dotcloud, Stackato, OpenShift, CloudFoundry, etc?

The last two (OpenShift and CloudFoundry) are already open source PaaS solutions that you can use either on-premise or hosted externally. Read more on my post comparing these four providers. http://appsembler.com/blog/paas-bakeoff-comparing-stackato-o...

I can tell you from experience that building and supporting a PaaS is a lot of work, and I think it will be difficult to make it sustainable unless you are offering it as a hosted service.

The only other provider that I know that is not offering a hosted PaaS is ActiveState's Stackato, and they have 15 years of experience selling to enterprise customers.