RE "Zuckerberg's" Facebook idea: When I was at Georgetown University back in the '90s, at the beginning of each year a printed directory of the students came out. In that book, was a photograph of each student and their profile, including name, where from, where went to undergrad, and a few other things. That book was called "the Facebook." So the idea to take the physical facebook and bring it online, with the same name and same initial content, was just lying there on the ground for years, waiting for someone to notice it, bend over, and pick it up. As the concept of social networks speard through the populaton, the ease of noticing the opportunity grew more obvious. Finally, a few years after online social network pioneers launched (Friendster and then MySpace), someone noticed. I'm surprised it took as long as it did. How many other opportunities are hiding in plain sight. Many :) PS: Yes, ideas are "nothing" without execution.