website generator

Hello,
I already noticed the power of Open Atrium and since the new theme, it is even more better. Thank you for this :-)

I plan to create a website and I think Open Atrium is the solution, but I do not know how to create it...

I want to create Blueprints for differents Space types:
( WebRadio, WebTV, Projects, Professionals, ... )
Each Spaces has Content types.
( Presentation, Videos, Events, Audios, Articles,... )
A member is able to create his website based on one of these blueprints an must have the ability to add content in it.
Each space must be located on a subdomain.