This week I attended a great talk by Dafna Shahaf. In a nutshell, she has a method for finding surprising insights in the data. An open source project is on the way for sharing some of those tools.
Several applications domains were covered. For example, in the medical domain, two of the system findings (out of 4) are major medical breakthrough revelation as defined by external physician who examined the output. For commerce, the system can find surprising Amazon products to recommend to people. Here is a nice example:
For people who are looking for child's toys there are a lot of related selections in the pet section. For people who need a bath mat, there are related products in the car department which are much cheaper..