Some Defcon posts from around the web, mostly Hack a day - Joe Grand MAKE author and tech advisory board member out did himself again with this year's badges - photos and files ahead...
Defcon badge (open source hardware):

- Defcon badge hacking (Wired, photos from Dave) - Link.
- The Defcon Badge - Link.

Defcon badge files here (Make your own) -
Link.
More coverage:
- Exploiting authentication systems - Link.
- Hacking EVDO - Link.
- WiCrawl from Midnight Research Labs - Link.
- Robot challenge - Link.
- Beer cooling - Link.
- Black Hat 2007 other wireless - Link.
- Black Hat 2007 AJAX - Link.
- Black Hat 2007 No-Tech Hacking with Johnny Long - Link.
Go Voice?
Reply to this comment