Sometimes I use my blog posts as a note to myself or clients. This way I can organize answers to frequently asked client questions in one place (thus eliminating unnecessary emails).

Common question:
What statistics/analytics does Facebook provide on application usage?

Answer:
Note: This should serve as a high level summary for business/marketing users of Facebook applications

Summary Information

• Monthly Active Users
• Total users

Usage (Over Time) - how many people use your application

• Active Users
• Canvas Page Views (Total and Uniques)
• Blocks and Unblocks
• API Calls Usage (and other non-marketing details)

HTTP Requests (Per Period) - specifcs information on what calls are being made to your app

User Reponses (Past 7 Days) - stats on how feature metrics compare to those of other apps

Application Features (Over Time) - how people use your application

• Canvas Page Views
• Emails Sent
• Request Processing (Accept/Ignore/Block)
• Feed, Bookmarking and Tag activies

About Page Statistics (Over Time) - who are your fans

• User demographics (sex/age)
• About page activity (views, uniques, posts, reviews, photos, i.e.)