World view: Readers share data; b2b digital rev up; RDA picks new CFO; kids' apps

Report: 40 per cent of app users opt to share data with publishers (Audience Development) 
Why do we need a postal service? (Buzz Machine)
Primedia sold to TPG Capital for $525 Million (Audience Development) 
B-to-B digital revenue up 15 percent to $4.6 billion in 2010 (Audience Development) 
How the postal service subsidizes The Wall Street Journal -- and Why It Should Stop (Dead Tree Edition)