Open-source project as startup?
russell: The crux of the matter is how are you going to make money?  After all investors want a payback.  The best advice I've seen here is to find a consulting niche in security.  See if DARPA has something on their wish list or apply directly.  I suggest you do some serious networking in your city/state.  Maybe team up with someone who needs your platform to leverage their expertise.Tell us where you are.  Maybe someone might have a lead.