Just creating and publishing a simple app or proof of concept can make a huge difference in generating interest from possible partners.
Most biz guys make the following offer: "I have an idea; I need you to implement it." Imagine if he could say this: "I have a prototype that I've been working on, but it's pretty amateurish; I need you to make it professional." I know which one I would take seriously.
Or even "I paid someone to do some mockups and/or a small prototype, but I need someone to make it really work properly". That would indicate they'd gone beyond the 'idea' stage in to concrete action, and aren't afraid to put up a bit of cash to get started.
Most biz guys make the following offer: "I have an idea; I need you to implement it." Imagine if he could say this: "I have a prototype that I've been working on, but it's pretty amateurish; I need you to make it professional." I know which one I would take seriously.