A couple weeks back I posted about Mark McElroy's excellent book Putting the Tarot to Work, about using Tarot cards as a brainstorming tool. Last week Mark sent me a brand new brainstorming product from Tarot Tools called The Bright Idea Deck. I love it!
Mark basically took the same concept of using Tarot cards as a point of departure for brainstorming (what could this mean? How could this apply to what I'm trying to do? What should pay attention to that I'm missing? Etc.) and created a card deck specifically designed for that.
There's an excellent review of them on the Bella Online site to give you a more in-depth picture of what they're all about.