I wrote a greasemonkey script https://gist.github.com/1187770 https://gist.github.com/1187770 What this does is allow you to navigate through the comments chro

I wrote a greasemonkey script https://gist.github.com/1187770 https://gist.github.com/1187770 What this does is allow you to navigate through the comments chronologically, using the right and left arrow keys. That is, when you visit an HN thread, you just press the right arrow and it takes you to the latest comment. Press it again and it takes you to the 2nd most recent comment, etc. Pressing the left arrow moves you backwards.