Maybe I'll do something like this someday too...
Remember, this is about participation... a do-ocracy...
All you need to do is make the space, and invite the do-ers to do their thing.
It's kinda amazing what happens when you invite 6 people to come over, have some wine and snacks, and then you present your Big Idea to them.
That's how Maker Faire started. That's how Figment started. That's how every theme camp you've ever heard of, started.
One person got some friends together, and infected them with an idea.
"Maybe I'll do this someday..." is the wrong headspace. "I'm gonna invite X, Y, and Z over, and tell them about my half-baked idea, and show them some web sites and photo galleries, and we're gonna..."
It may not materialize for 10 years. But it won't ever happen if you don't share the ideas with others. So why not do it now?