I like your site. My only criticism is that there are not dates and times with anything. It would be nice to know how old a tweet is instead of assuming you are sorting from most recent to oldest.
Functionally I also cannot seem to scroll to the bottom of the tweets, and I would fix the loading on the main page. The news articles are loading on the left side of the screen and then shifting to the center.
Awesome idea, something I've been wanting to see for a while. Maybe add a splash/about page to give more information on what it is for people who happen upon the site from other sources than HN, where it has been described.
Functionally I also cannot seem to scroll to the bottom of the tweets, and I would fix the loading on the main page. The news articles are loading on the left side of the screen and then shifting to the center.