I like the idea, but before you even tackle the challenge of educating people about this resource (which is huge), you have to ask a bigger question: How large do you think the market is for this type of exchange? How many entrepreneurs are asking these types of question and need help that only PHDs can provide? What are alternatives for these entrepreneurs to get this information today? How hard is it for them to do that today?

Seems like the use case is very narrow. Can you think of another use case that is a bit more broad but not as generic as Quora and Clarity?