The website looks aesthetically pleasing, and the idea is very good, if implemented right. Even if it isn't the most original idea, that's not what matters. Something worth thinking about if you already haven't:
What, exactly, is an "idea"? Will the person first creating the project decide all of the specifications? What if there is an idea with $2000 pledged to it, and I have a very similar idea (but slightly different) and am willing to pledge $3000 more, but insist that it be different. Can people defect and re-pledge to my idea? Since I'd be providing the most money, would that give me power to change the specifications? Who is in control over making decisions like this in production?
We're going to start with a fairly simple negotiation scheme between pledgers and developer, and we'll see how it works. A pledge is a commitment, so pledgers can only defect if the developer's not doing his job over time (pledgers vote on this).
As for bigger pledges having more voting power, we're considering this for commercial projects. But not for open source -- part of the attraction of open source is that it's not (too) controlled by money.
What, exactly, is an "idea"? Will the person first creating the project decide all of the specifications? What if there is an idea with $2000 pledged to it, and I have a very similar idea (but slightly different) and am willing to pledge $3000 more, but insist that it be different. Can people defect and re-pledge to my idea? Since I'd be providing the most money, would that give me power to change the specifications? Who is in control over making decisions like this in production?