Some of us value our time. And this is not a techincal project it's an end user project. So as an end user I want to know quickly if it's worth my time. Even on a techincal project I want to know a rough overview within a minute or so of reading. Marketing is all about giving people the info they need fast. Marketing is about selling the benefits and telling of the pains it solves. If you're unable to do that for your project, why did you build it?

And I think the person who spends their time reading techincal documentation to decide if a social network is worth using is probably sadder than the person who goes and reads the about page. Not got much else to do?