The ADM is now looking for comments on their new unit standards, and measurement guidlines that they have whipped into a rough draft.
Advertisement Unit Standards (download here)
The purpose of the Advertisement Unit Standards is to provide baseline recommendations for advertisement units in order to better facilitate advertising transactions relating to downloadable media.
Measurement Guidlines (download here)
The purpose of the Download Measurement Guidelines are to establish baseline recommendations for how individual publishers, companies and organizations can measure how downloads are delivered to consumer audiences.
Once you've read these be sure to go to http://www.downloadablemedia.org/index.php/standards to leave your comments.