The VMK WDI pins, specifically the pirate and space mountain ones. I have my first two comming in the mail from a trade:
Pin 60033: WDI - Virtual Magic Kingdom - POTC - Hurricane Bay
Pin 60036: WDI - Virtual Magic Kingdom - POTC - Burning Village
I can't wait to get these pins and begin this collection! 2 down, 6 to go (if I decide against the Tiki collection.. most likely).