I would love to see information from PG on the following in relation to the recent changes in HN:

    - increase/decrease in activity of users with highest karma
    - increase/decrease average in comment score, normalized 
        by time after post of OP
    - amount of time the highest rated posts stayed on the front page
    - trends for # of flags

Also, it would be great if he put the guidelines on the submission page.

I've posted this before, but haven't heard anything.