AdSense Referrals will be retired at the end of September 2008, and We have been covering Google Ad Manager since its launch and also since we started using it, our hosted ad serving and management solution for publishers with smaller direct sales teams.But the biggest complaint was that they could not get accepted into the beta. But now, Google Ad manager Now Open For Everyone , “we are pleased to announce general availability of the product — no invitation required!” , Well its now open to everyone who has a Adsense account .
From the Adsense blog:
Now we’re excited to bring those benefits to all publishers. If you have an AdSense account, you can sign in to Ad Manager today. If not, apply for an AdSense account now. A Google AdSense account is a technical requirement for creating an Ad Manager account.
Ad Manager can help you sell, schedule, deliver, and measure both directly-sold and network-based inventory. It offers an intuitive and simple user interface, Google serving speed and reliability, and significant cost savings. Best of all, Ad Manager can be optionally integrated with Google AdSense to offer you an automated way to maximize the revenue of your unsold and network-managed inventory.
Google Ad Manager serves as an effective complement to the DoubleClick Revenue Center by providing new opportunities for publishers of all sizes. It is pretty awesome. I recommend you give it a whirl.