How To Vet Clever Ideas Without Giving Them Away?
If the guy took his idea to every major car maker, he wasn't keeping it a secret. He had the proper protection in place. I don't think that many companies would try to steal an idea right out from under you now as they all know they are going to get sued, and if you have your patent in place then you ideas are protected.
Oh and before Apple made it big, Steve Wozniak was giving away plans for the Apple I and Microsoft got it start by developing BASIC and DOS, neither of which were actually originally Microsoft ideas.
An AI 4-Year-Old In Second Life
Ever spend any time with a 4 year old? They are all little running chatbots.