I finally got accepted into Yahoo Publisher Program after applying 3 weeks ago!!! Anyway, I have put their ads on my website. I heard that their payoff were better than Google adsense. Their ads however do not seem to be well-targeted. If anyone has been using Yahoo ads, i would like to hear about their experience so far with them.
In addition to contextual ads you can choose targeted ad categories. For instance I wanted to see finance-related ads on my site so I chose that category and the ads were served almost immediately. You don't have that option with Adsense.
I applied in April-May of 2005 when the beta program launched, I got my acceptance email in Nov...... if yours took 3 weeks that was very fast. You can select what types or category of ads show up, but make sure you select ads relevant to your sites content, so you don't get banned for non relevancy. For instance if you have a site about chevy vehicles, don't select real estate ads.... etc. Selecting ads that pay big, is great until it gets you banned, better off letting there system choose, or select the category that is the closest related to your content and subject.