Of the people who have approached me to possibly work with them, I have yet to encounter one totally original idea. Often, they'll tell me it's original, but a quick Google search will turn up a few to a few dozen competitors already in the space.<p>It doesn't mean the idea is bad, and it doesn't mean that a good execution of the idea won't be successful. But, there's no reason for an NDA, and there's no reason to be concerned I will steal the idea.<p>The implementation is key. If the person with the idea also figured out what the user interactions will be like, what types of data are needed, and what separates the product from direct or indirect competitors, I might be interested. If the person only has a vague idea of a project management system that addresses the market between Microsoft Project and Basecamp (an idea I've been pitched more than once), I'm not interested.<p>I'm also no longer interested in signing an NDA before discussing an idea. If we get further into business plans, financial information, and specific implementations, sure. But by then, I've already agreed to work on the project, and I'm getting compensation in return.