What is the key success factor for a social application or service? I used to think this was a great functionality that makes it unique. Like last.fm was unique and so were Flickr, Twitter or Delicious. They created something new.
Most new applications have social network components. You can share, invite and more. I wonder what is more important for a new successful project. Is it the network you are building around your service or is it the technical environment?
Content is important, Originality and Technology are, but the People using your great invention are equally as important to make your service a success.