A great idea. Some personal thoughts: 1. I would like to be able to see all the comments from selected people (myself by default). 2. I would like to be able

A great idea. Some personal thoughts: 1. I would like to be able to see all the comments from selected people (myself by default). 2. I would like to be able to un-conclude a thread for the fat-fingered among us. 3. As I hover over the document, if there are comments, I would love to see the comment count to judge the activity (or something to show hotspots -- now or over time). 4. I would like to be able to start a discussion with an external markdown file. 5. An API to access updates (including real-time changes) would be excellent. I've also dropped these in the Github comments.