I will say that ideas are generally far less valuable than a first customer. My readers told me time and time again that they wanted to be connected to someone who would pay for the idea. That is the real challenge, and if you can figure that out, you're going to have a booming business. And I think there is opportunity in the space somewhere between e-lance and just "ideas". Some kind of platform that matches a developer and an initial customer in a way that rewards both. Finding these people is a challenge, but I think it's possible, and the person who figures out how to do it is going to have a MASSIVE business on their hands. I could go on about this a lot further, but I wholly recommend exploring it.
I'm onto my next project now, which interestingly is helping people find investing ideas. We launched yesterday so we'll see how it goes. If you want to chat about the idea space - cory @t topstonks.com or check out the the new project its at http://topstonks.com. Good luck!