I just saw that the new search function in Brewer's Friend lets you include "Fermentables", "Hops", "Yeast" and "Other" in your search criteria. I'm not generally a big fan of public recipe sites like that, because there's a large signal-to-noise ratio in finding a good recipe. But it's certainly a good way to go idea-mining.
For example, entering Midnight Wheat and Centennial gives a lot of Black IPA recipes. If you're looking to see what others are doing with a certain ingredient this is a decent way to search.