As soon as you've got something started, with a decent amount built, I would start spreading the word. Think about it this way, once you've started, even if you

As soon as you've got something started, with a decent amount built, I would start spreading the word. Think about it this way, once you've started, even if you tell someone intent on stealing all ideas that come their way, you'll be ahead of them. You can be first. The only issue now is that someone will come out with something better, which is always a threat no matter what stage you're in. Another way to look at it is like this: As soon as you've got a company started, tell everyone, and tell them what need you're going to fill. You don't necessarily have to tell them how you plan on doing it, but let them know it's going to be done. If you're working on a way for people to sort and manage email overload, tell them. You don't have to tell them "We're using x algorithm to reduce emails and change the way people view the traditional inbox." Bottom line, sell the value as soon as you can, and sell the method as soon as you have something.