I like that idea, although I think we need some simpler guides as to what exactly one might he getting into if they're setting up an instance that's not just a domain name. (Costs, potential usage blowing up, legal issues with content, etc...)
Also, I really think there needs to be a smoother way to navigate between instances. I guess, so you're still aware of "jumping nodes", but also don't feel locked in there. (Although maybe I'm just a newb still haha)