I'm running YPN ads on some of my site's pages. I don't mean to sound like I'm lecturing anyone whose patience is wearing thin, but I'm participating in the program with the understanding that the YPN is in Beta. They're working out the problems.
It may be reasonable to assume that some of the program's teething problems are as frustrating for the Yahoo techs and reps as they are for the rest of us.
I will also say that the few times I have contacted YPN, their responses have been quick and polite.