It's not true that everything that has been said has already been written. Since that unfortunate axiom came into use, the whole universe has changed. Technology has changed, ideas have changed, and the mindsets of entire nations have changed.
The fact is that this is the perfect time to write an e-book. What the publishing industry needs are people who can tap into the world as it is today — innovative thinkers who can make the leap into the new millennium and figure out how to solve old problems in a new way. E-books are a new and powerful tool for original thinkers with fresh ideas to disseminate information to the millions of people who are struggling to figure out how to do a plethora of different things.