Normally you get a cheap jacket or backpack, and yes, lots of opportunities to make contacts with Apple developers at labs or people from other companies.
One year I was working on a kernel driver and I got acquainted with several Apple kernel driver developers during labs at WWDC. After the conference I could email them directly when I had issues. That was extremely valuable compared to going through Apple's official technical support incidents.
One year I was working on a kernel driver and I got acquainted with several Apple kernel driver developers during labs at WWDC. After the conference I could email them directly when I had issues. That was extremely valuable compared to going through Apple's official technical support incidents.