Well, number 9 at least. One of my websites, a message board, has somehow turned up as the ninth result on Yahoo for "(subject) forum." I have no idea how this happened; I've never pursued any listing on Yahoo at all. Barely anyone links to us. I only just recently changed our robots.txt to allow the site to be indexed.
Anyway, we're suddenly starting to see people arrive because of search results rather than just word of mouth. I think this is going to alter the site dynamics in interesting ways.
