Noticed this in Adsense today - NEW Congratulations, your account has been upgraded to include the all new Referrals 2.0 - click here to get started The page it leads to then says: Referrals Google Referrals allow you to choose specific products or groups of products to advertise on your site, allowing you to match ads to your content. Choose up to 15 products or specific ads to rotate in the referral unit. You can also choose categories and keywords to ensure that you get newer ads as they become available. Seems like an interesting idea, though not sure why they are giving publishers this option. For some reason the ads etc reminds me of ClickBank - which is not a favourable viewpoint. Your thoughts?