This would be a community of deco enthusiasts, in which they publish photos of how they decorate their home, sharing their deco style.
It would have categories, and you could for example browse images showing how people decorate kitchens, or bathrooms, etc. You could also browse categories by brand (show me kitchens including Ikea products) or even type of decorations (modern, rural, etc).
It would have links to buy the furniture you are viewing.
In a way, similar to my project http://chicisimo.com, but for the deco world:)