This explains what the uber/black badge is and how people obtain it: https://www.defcon.org/html/links/dc-bb-policy.html

Here's some blog posts about people who've run the gauntlet:

http://potatohatsecurity.tumblr.com/post/126411303994/defcon...

http://elegin.com/dc21/

https://1o57.wikispaces.com/DC20+Badge+Contest

In hacking circles, this is kind of a big deal to get one of these. It gives you a lifetime free admission to any future DefCon conferences and you're entered into a Black Badge HOF and plenty of bragging rights.

https://www.defcon.org/html/links/dc-black-badge.html

The first link is a great read. The amount of work required to earn one of these is amazing. Well earned and certainly deserving of the amount of respect awarded by the community.