I'd love to see a tool that allows one to input ingredients and see flavor overlaps. It'd be really interesting to use this with one's favorite foods and use it to build recommendations for others.
[0] http://www.amazon.com/dp/0316118400/?tag=mh0b-20&hvadid=3521...
But even then whether food tastes good or not is very complex and goes WAY beyond taste receptors. There's the obvious smell and the way it looks, but even the sounds around you while eating, how hungry you are, what your drinking, the temperature of your beverage, the room's light levels, temperature, and humidity, and even the height of the table, what kind of chair you're sitting in, and the texture of your napkin will affect how you perceive the taste of a meal.