The Harrow deck is our fortune-telling tool for this Adventure Path. The deck itself is a 54-card deck broken down into six suits of nine cards each. While, in-game, these six suits and the card images themselves are "in character," it draws a lot of its inspiration from the mechanics of the game as well. The deck's six suits each symbolize one of the six basic attributes all characters are built around: Strength, Dexterity, Constitution, Intelligence, Wisdom, and Charisma. And in each of those six suits, we have nine different cards for each of the nine alignments. Therefore, we have a chaotic evil Wisdom card, a neutral good Strength card, a lawful neutral Dexterity card, and so on.
Now if they can build a rules mechanic around it, I'd be in heaven. Granted, I doubt I'd ever get to play the game, just as I doubt I'll ever get to play my tarot-based mechanic for Fading Suns that languishes in rough-note form, but it'd still warm my heart to know such a thing existed.