Following on the same theme as my earlier question about finding a place to share ideas and get feedback.
Marry StackExchange communal voting sites such as this one and StackOverflow with crowdsourcing concepts. Throw in microloans like Kiva. Does such a thing exist?
I want a site where I can share an idea, people will vote on it, critique it, improve it etc etc. Once an idea is strong enough the 'inventor' can open his idea up for angel funding (think low amounts ala YComb) and the 'crowd' can then invest small amounts into the idea to drive a true market value for the idea.
Does such a thing exist? If it doesn't is it something meritorious enough to consider my time to build?