Even if you follow Spine.js and Alex MacCaw closely (as I do), this recent interview with him on The Changelog is a good opportunity to hear the backstory on many of his design decisions. He discusses Spine and Backbone, Eco and Mustache, and weighs in on the debate about emulating native look-and-feel in mobile Web apps. Naturally he doesn't fail to mention how much he values CoffeeScript and admires Jeremy Ashkenas. It's fairly short (20 minutes), but definitely worth a listen.
Also at The Changelog is this epic interview with HTML5 Boilerplate creator Paul Irish. I consider it an overflowing grab-bag of goodies for anyone who develops for the browser.