Ok, this site just seems like a worse version of r/IAMA. I can't really see the appeal.
To me, it looks like an accessible-to-normals version of r/IAMA and I see the appeal clearly.
Also, the (apparent) lack of ability for follow-up questions and conversations based on answers seems to be a big downside. Be it reddit, HN, or Wikipedia, nested conversations are a no-brainer in 2011.