An update on the Irrelvant YPN Ads on Our Forum is that we are now seeing more relevant YPN ads in our forums since reporting it here. For some reason, I do not think all the folks complaining about the relevancy issues have seen improvements. But many people believe that the irrelevant ads are due to the fact Yahoo! wants to give its publishers a higher payout then AdSense. So they serve up higher paying ads, even though they are not incredibly contextually relevant to the page copy.
So I am now seeing ads on Web Design, SEO Services, and others. And very few of those high paying ads. Did I just kick myself in the butt? :)
I have updated our thread on this at Search Engine Roundtable Forums.