Justin Wolfers (over at Freaknomics) has with his significant other and fellow economist Betsey Stevenson put together a widget for calculating the risk that you will divorce in the next 5 years, given a few simple demographic characteristics. (I think he wants to make the point that most folks overestimate their personal risk by comparing it to the overall roughly 50 percent divorce rate).
My husband sent it to me. His risk of divorce is 1 percent. Mine is 5 percent. Statistics are wonderful things.