I had written David and NTP down as a podcast episode idea. Never expected to get scooped by the New Yorker.
Also: Olson timezone database and its various maintainers. Paul Eggert is the current maintainer, I think. Arthur David Olson could be interesting as well.
It's a podcast I've really been enjoying for a few years now. It used to be a little more technical (as the name, corecursive, kinda implies), but found a niche in interviewing people more about the people than the tech they're knowledgeable about, which is also very pleasant. Anyway, I encourage you to listen to both an early and a recent episode to find out if you like it.