I would wager your story is very similar to mine, and to others here. It's why we're here, after all.
Balsamiq uses Get Satisfaction to take in feature requests from users, and they go back and forth with wireframes and mockups right there on the site. That's part of their culture, that's not a function of the site. It sounds like you're trying to fix a sociological problem with technology.
1. If a company is not set up, top to bottom, culture to practice, to take in outside feedback, the effort will fail. The development culture and practice within a company that treats constructive criticism from their users/customers as first-rate along with their internal QA and engineers is completely different from one that doesn't. You see this in any company that releases an SDK, publishes an API or licenses technology. Some will rearchitect entire APIs because they realized they got in wrong once people started trying to use it. Some will pack up their ball and go home.
Having spent years running support and developer relations teams, my cynicism tells me the companies you will attract will be the latter, trying to be the former. The former doesn't need you; they can do it themselves, because they believe in it already. The latter will use you, but will fail internally because they don't really want to listen. You can't change a business model and internal culture with a web site. Now, with management and process consultants...
2. No, I don't care how the company is losing. It's a company. It's not a person whose life I can materially improve by helping it. It's a bureaucracy that exists to extract profit at the expense of its customers and employees. Inventing something that improves a particular coffee maker doesn't help anyone but the shareholders of the coffee maker making company; everyone who bought that particular coffee maker isn't going to get a free replacement. You would better serve the people who have the same problem with the same coffee maker by publishing a fix and offering replacement widgets via mail for some token amount, or by making your own coffee maker that solves all those problems and more.
3. I'm not going to go back and re-read the post to highlight specific complaints, but the entire tone, I find, is one of bitterness. It's not wide-eyed idealism, it's "I'll show you all," which comes across quite differently. This is the lack of diplomacy I mean.
Your "points that are made are that" paragraph here is better, but remember that your beliefs aren't everyone else's.
I believe that most people don't want to be inventors, producers, journalists or musicians. Most people don't "demand" to give ideas. Most people don't think that hard about anything at all, but technology in particular, as the priesthood culture of technology has trained people to believe that if something is wrong with technology, it's really their own fault (I'd quote from DoET, but I can't find my copy). And, of those people that have ideas, most lack the subversiveness to do anything about them.
Despite all of these things, I really hope you find both some success with this and in the future. I hope I'm wrong and you change the world. But, if I'm not, I hope you come to understand why at a level deeper than "no-one got it," because that greater comprehension of the system of the world is what will really help in your next venture.