There is an excellent post on the Adsense blog this morning clarifying why publishers can draw attention to the referral products Google offers. Google referral products include Google Adsense, Google Adwords, Firefox with Google Toolbar and the Google Pack. recently Picasa was rolled in with the Google Pack, if you was wondering where it went.

To sum up the post you can draw attention to Google’s referral products because they are a cost per action basis, opposed to a cost per click, and because you know exactly what product you are referring, unlike ads where it could be almost anything.

Of course you are still not allowed to have people click or install products for deceptive purposes, and the attention should be done in a way that supports the product or service. I hope that means NO POPUPS, since I absolutely hate them.