I may be there.
I may be bringing a new P1-based badge.
I may not even have the PCBs in hand yet (hello last minute).
Kinda roll-your-own functionality.
0. QWERTY keyboard
1. Two OLED displays mounted next to each other (widescreen if you wish)
2. Wifi on-board (at Defcon - forget it).
3. ISM Modem with range measured in miles.
4. DIP switches enable LEDs attached directly to each Prop pin. Idea being that you can watch the IO on every port and disconnect them if they cause issues with connectivity.
Certainly the most densely populated board I've ever built - hope I didn't screw this one up ;-)