As you may have noticed Google is now allowing (or soon will be) other ad networks besides Adwords to place ads in the Adsense Network. By clicking on the Adsense Setup tab and then clicking the Ad Review Center, you will find the list of Certified Google Ad Networks that Google is now allowing to enter the publisher marketplace. (You have to click the "change" link to actually see the list.) By default it seems all of these new networks are allowed. If you want to block any of them, then you must be pro-active. While I do not recognize any of these Certified Ad Networks, personally, I see no reason to block them. Does anyone have know of any problems with any of these new ad networks or with the general program? I certainly trust Google to vet these properly as it is in their best interest to do so. And I also see no reason why I would block any of the new ad resources. As Google is suggesting, the more advertisers who want to appear on my web pages - the greater some or all of them will have to pay. And that should increase my daily revenue. So my plan is to sit back and let these new ads appear and monitor my revenue to see if things get better... What about you?