Actually, I have started working on one of my next e-books: 100 Creative Blogging Ideas...
One idea that I had was to use a blog for the communication of people who are from the same family or on the same work team but live in different places around the world.
All the members of the group would have the option to add blog posts and tell of important news to others.
Alternatively, a different group member would be in charge of the posts for a specific period (say, a week) and make her/his mark on the emerging final result.
By the way, do you think such an e-book will be of interest to bloggers or potential bloggers?