I got a call from them a few weeks ago. They were following up on my experience running YPN ads on one of my sites. I told him how I had tried, but then dropped them after 3 days because the ads were not even close to being targeted to my site's niche. During those 3 days I didn't get a single click even though G's ads usually generate at least 2 or 3 a day at a minimum. Explained to the YPN rep that I realize that this particular site is in a VERY targeted niche (G does ok but is still fairly general in what it serves up) and that I fully understoood that YPN is in the beta stage and they are learning and developing. Said I still plan to try them on some other much less focused sites planned for roll out in the near future. The rep said thanks for the feedback! Hope this is relevant to what you were asking.
they called me on 2 occasions. i must say, if google was this warm to thier publishers i think people would be much happier feeling like someone there cares. i'm not saying that google doesn't care ... i'm just saying that yahoo definetely does ... at least in this beta stage.