Some reasons why this may not be a great idea: * No one really reads their own posts afterwards. * The crap you write on facebook is for others - ie, rarely deep enough to keep for yourself.

One place I think you could make money: New Parents.

These guys post pics of their kids all the time and text. Grab all that put it into a book. I think that would be very easy for a new parent to do (because they already do it) and very valuable. It would be 0 effort for parents which I'm sure they would appreciate. Otherwise they'd have to download all the pics and then make a book adn add text etc ...