This is the guy I was referring to in that "other" thread. His name is Stephen Key. I would've linked to this before, but couldn't remember where I'd read about him or what his name was.
http://www.fourhourworkweek.com/blog/2007/11/26/a-beginners-...
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"Stephen is somewhat famous in inventing circles for two reasons. First, he consistently earns millions of dollars licensing his ideas to companies like Disney, Nestle, and Coca-Cola. Second, he is fast. It seldom takes him more than three weeks to go from idea to a signed deal.
"He is not high-tech. There are no multi-year product development cycles. He specializes is creating simple products or improving upon existing products, often using nothing more than a single-sided drawing or photograph. Coupled with refined cold-calling skills, Stephen meets with some of the most influential marketing executives in the world. In this interview, we’ll explore how this advisor to American Inventor rents his ideas to Fortune 500 companies."
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In the "other" thread, of course, I wasn't talking about ideas having value insofar as one could simply sell them. Good startup ideas are sort of like treasure maps. A really, really good idea is like a map that shows you where an incredible fortune is and has a high probability of not being a fake, but you obviously will get none of that treasure if you have no means of getting there and procuring it (execution).
Lots of other good ideas are treasure maps that have a higher probability of being a fake, or have significantly less treasure waiting where X marks the spot. Such maps may be so abundant that no one will be particularly interested in following yours over their own, which is why it usually doesn't make sense to worry about someone running off with your idea.
But if you give someone a copy of a treasure map that they know to be highly reliable and leads to a much bigger treasure than the one they're chasing after now, and they can mobilize the means to get there faster than you, well, therein lies the temptation for someone to run off with your idea.