try it out, let me know what you think. i promise not to hack your hackernews.
Edit: I liked the j and noticed it even worked elsewhere (bestcomments is when I ran into it)! None of this is requests, just reflections. Still warming up to the keyboard navigating collapsed comments behavior. Also I think I remember the original HNMarkAllRead 'hide stories' checkbox hid stories after visiting comments. (And there was a hide comments checkbox that when marked only revealed new comments since the last visit) There are lots of workflow permutations to hn!
i actually did this whole multi-layered object model to wrap around the dom to enable pagination more easily. took about 2 days of coding to figure that out. doing it that way made it so that you can even refresh the page and it will 'remember' where active article is. none of the other extensions are this well thought out.
what i'd like to do is add kind of a bookmark and tag system so that you can store what you want to read later and be able to tag it so that you can search for it. favorites is close, but it doesn't quite cover the same use cases.