See our Aetna Certification page for the details of what I know at this point. Once the certification opens on July 27th, we will have all of the detail on how to certify.
We do not expect to receive any 2010 product details until early August. Keep an eye on our Events Calendar for product training events (live and webex) with Aetna as they are announced. Certification can be complete prior to the release of 2010 product informationa and the product training events are recommended, but not required.