AdAge recently posted a great article urging magazine publishers to reveal more information regarding tablet performance.
Metrics and information they want:
Audience for subscriptions and single-copy sales
Duplication and basic demographic information
Separate print and digital rate bases
Even though tablet is a relatively new medium, buyers are urging publishers to disclose as much information as possible. Getting this letter out to the Association of Magazine Media outlining the importance and need for data is a step in the right direction.