Very nice. I think you need to decide what is the main point of your site. is it an alternative way to read HN? Is is a curated edition of HN? or is it going to be something on its own eventually, and HN is only a method to jump start it?
For example, my pet peeve for HN is that they don't send emails, so I have to check back here. So, my project is exactly about that: Your comment should be send back to you and the one you rely to, in full text with basic markup, with proper email threading maintained.