What would it take to make a Facebook alternative with Fluther standards?

I just am getting so fed up with all the FB changes that they’re making just for commercializing, instead of thinking about the users. Then there’s the chain-mail style spam. I just saw a new one – that the FB creator, Mark Zuckerberg, will delete your account if you don’t copy-and-paste the chain to at least 15 other posts. Come on. I posted this in my status and a “friend” told me to stop complaining. Whatever. I know it would take a lot of work, but what exactly would it take? I have huge ideas floating around in my head for a site kind of like Facebook, with a store in my town kind of like a boutique, only for kids….really complicated and probably impossible. But I can dream, can’t I?