It's just been kicking around in my head. Serving targetted 'ads' that link to interesting websites might work considering the numbers of people who go to digg/reddit etc. Arranging it chronologically as everyone does is horrible. I'm sure I've missed a lot on HN because I wasn't here.

But there's a branding problem & I don't see anyone spending months on something that google/stumble/delicious can duplicate with a small script.