I don't know about that but Techmeme clearly takes HN into account. I've noticed many times where an article makes it to Techmeme without any other blogs linki

I don't know about that but Techmeme clearly takes HN into account. I've noticed many times where an article makes it to Techmeme without any other blogs linking to it. Every time that's happened I've found the article on the top of the HN page.