To make you really jealous - that's Joe Grand showing off the badge
I see a DefCon badge in those pictures... Now I'm REALLY jealous!
You can read up on his design for the badge, as well as the ones he designed for prior DefCons, on this page at his site.
At AtariAge he's probably best known for his homebrew Ultra SCSIcide.
Last one I went to was #11. Damn I'm old!