Neat. I started working on a bookmarklet to improve HN last year called Hacker News Enhancement Suite:
https://github.com/driverdan/Hacker-News-Enhancement-Suite
I never got the code far enough to announce / release. The long term goal was to also make plugins.
And I actually posted my extension also called 'Hacker News Enhancement Suite' yesterday but no one saw/cared.
https://github.com/etcet/HNES http://news.ycombinator.com/item?id=3933090
I cannot say how angry/sad/confused this makes me :(