The linked interview with Swivel was interesting. I'm attempting a data visualization startup. But I've found a niche where customers have a burning need and money but lack the IT resources to implement their own solution. It's not enough to draw charts; Excel can already do that. You have to provide everything customers need, from fetching the data to analyzing the data. And it's still a tough sale because SaaS is newish and people are uncomfortable handing off critical business data. I can think of a dozen other niches where paying customers need data analysis and visualization.