I wish I had the equivalent of threads for my own blog... there's something uniquely interesting about a publishing medium that produces a chronological record of the way you explored a specific thought

A thread is almost like a mini-blog for evolving one very specific idea over time

The biggest design challenge is deciding what to do with threads that might have new notes added to them for months or even years - how does that play into a most-recent-posts on the homepage and at top of RSS feed blogging platform?
@simon Wikipedia Talk pages typically are marked up into threads; the atom feed simply carries timestamped diffs of edits. Overall not really pleasent but the page could be endless I guess (or old content archived into sub pages and edited back etc.)