This is a question that commonly comes up among friends and peers engaged in the business of content and discovery. And the answer changes as the web changes.
The algorithms, languages, and technology that enable users to curate an online experience that feels genuinely and uniquely personalized is fascinating. To me, it’s what the web is all about. I’ve long been hooked on RSS and its ability to deliver content of all kinds, from audio/video podcasts to earthquake alerts, almost immediately as published.