I pondered this a few years ago with some colleagues but it never seemed possible to get off the ground: real programmers, who consider themselves fairly good, using best practices, working on real, meaty projects, videoing _everything_ and making it public. Actually being able to see in detail how this stuff unfolds would be great for me.

You can sometimes follow along with ludum dare etc but that's mostly stuff hacked together quickly. I'd absolutely love it if top open source coders showed up live streaming their work.