For me what would move this from an interesting proof of concept to something that might become part of my routine is incorporating user comments on the top posts into the podcast. What is the community's reaction to each post? What debates have they sparked? This is HN's secret sauce.
I have used Taxes For Expats for years and have been satisfied with their software and level of service, however for my particular case they cost several hundred dollars per return.
How Brands Grow by Byron Sharp is the most compelling overview I have come across about how marketing works at the aggregate level. Despite its flaws, Thinking Fast and Slow is a good companion piece inasmuch as it sheds light on how decisions are made at the individual level.