The product development firm, Insight, has launched a new funding model to help start-ups get through a critical stage of development Incubators are a fairly recent trend in the start-up world. They provide critical tools to a start-up; companies typically get office space that they share with other start-ups as well as access to valuable mentorship and potential investor relationships. But some fledgling businesses need more than tangential support to grow their businesses. They need critical partnerships in key areas to get their business to the next level. We recently learned of an interesting new model led by Steve McPhillamy at Insight Product Development . Insight is a product development firm that has traditionally worked with big, well-funded corporations. They've always wanted to help startups but struggled with the best model to do so. Product development is a costly endeavor, and most startups couldn't afford it. Here's the problem.…