- Chrome extension?
- Genius-style highlight a section and make a comment
- Drawn from Reddit too?
- Pull in references from your favorite blogs
- Crawl eg Scott Alexander, Tyler Cowen linkposts
- Reverse linking, finding back pointers
- What happens if the page changes
- Oh, this exists — was on that thing I commented on
- Did they even send me an email to notify that something got accomplished?
- And I’m not using it. Rip.