Ex-Googler Forum Statements On Google Navboost

In my interview with Danny Sullivan, the Google Search Liaison, I tried to get more details on Navboost and how it plays a roll in core updates and general rankings. I was pretty much shot down (I am a good loser). That being said, here are some old posts from ex-Googlers (from what I can tell) on the topic of Navboost from the Hacker News forums.