I agree, my biggest annoyance with HN search by far is the time filter. If I am looking for a post I saw a few weeks ago I have to search through a years worth

I agree, my biggest annoyance with HN search by far is the time filter. If I am looking for a post I saw a few weeks ago I have to search through a years worth of posts with my keywords in it (if it's between a year and a month ago). I think a good feature to add to HN Search would be some kind of clustering of the same link. So if a link has been reposted many times you can see all the discussions of it in one result.