There is a new cool Windows 8 app: Server PosterPedia.
In the app are various Microsoft posters which architecture and features are explained. Totally cool on a touch device where you can quickly zoom in and then you can slide back and forth on the poster.
Very Nice: Download: http://apps.microsoft.com/webpdp/en-US/app/server-posterpedia/f988071c-66dc-4281-8028-637ac0f09061