I think you're doing the right thing: you need to find a suitable cofounder.
My company developed from a University research centre. We built a prototype, and made it available for gratis usage. We built a small but enthusiastic community, and then formed a company to commercialize the product.
I would say we had a decent prototype before starting the company: it was fully functional, but had basically no integrations with any third-party systems. So it was a long way from plug-n-play usage. We built a few of those integrations for target markets as part of our commercialization efforts.
One of my colleagues at our former employer was technical, but was interested in the business side of things. He was able to take on the the CEO role of our startup, while I remained largely technical. I did however adopt the accounting side of things, which I think for many coders is fairly approachable. I think it's good to have enough exposure to be able to talk intelligently on both sides. I learned a lot about business.
I don't have any great insight into ways of finding a suitable person. I'd say that you need to have a solid relationship with them, and you absolutely need to trust them, their judgement, their commitment and their work ethic. I'm fairly dubious of trolling startup websites looking for a business co-founder, but ... having said that, I've seen a bunch of posts both on HN and elsewhere from people who are looking for a technical partner, so I guess there's market demand.
I don't know if it's a good analogy, but ... I think it's like dating. It'd take a year or two of knowing someone pretty closely before I'd be happy to commit to doing a startup with them. Maybe some more intense experience could reduce that timeframe?
Good luck!
