Played Operations TradeStop, from Palantir Technolgies! Really Fun demo of how structured and unstructured data can be used to derive information. Track unsubs from 9/11 through a maze of data, to glean important information.
Of course, having boundaries around the problem helps. But, what happens when you have petabytes of data, and a continuous stream? You can always find the pattern you are looking for, but how can you check it?