As an experiment in a different approach in getting user info it's really good. I too had fun signing up. But if there is something more to it, I can't say I've spotted it. Why does the user benefit from this service? It was kind of vague for my taste at least. On the other hand maybe I missed something.. :)

Just a technical note, I couldn't get it to work with Opera 9.51, after entering my name I was redirected to the first question and then instantly on the end page. You might want to fix that.

Kudos for the idea though..