It's not currently possible to post comments using the official API (or any of the unofficial APIs), but this probably wouldn't be difficult to implement using a standard POST request to the actual Hacker News web server. The harder part would be getting the interface for posting comments inside of Vim user friendly; it would probably be similar to how fugitive.vim lets you enter git commit messages.
I will definitely look into adding this to the plugin if enough interest is shown.
Maybe @dang would be kind enough to let us know if we'll ever be able to use the API to post AUTH and post comments.
Based on the way I read HN, some customization that I would definitely want to do are:
1. Headline navigation (mapped to 'j') - move cursor to the next headline instead of the next line
2. <Enter> / O opens the link in browser instead of the HN thread
3. Opened links get blurred
4. Quick page reload mapping and Auto reload
But this is purely based on my style of reading HN.
I don't know how this could be implemented nicely, though, without making it site specific. I'll have to look into vimium to see if I could at least do it for the sites I visit often. If vimium doesn't allow that kind of customization, pentadactyl and vimperator look like other possible options.
Would also add to the wishlist:
* when you click `u` to go back, it should keep the cursor on the item you were focusing on, so you continue where you left off
It's just a single, well-commented .vimrc file a little over 100 lines long. The main plugins that add to the visual appearance are the jellybean colorscheme and the fancy status line comes from vim-airline.
I also agree with few others here. Adding comments support would be so awesome.
I am trying to vote up for the comment support.
