It's been said that the credit card companies have such good data on spending patterns that they can predict major life events, such as weddings and divorces.
Anyway, I called Amex and they wouldn't tell me mine...
Based on their election widget and access to demographic information, Facebook probably could put together scarily accurate, realtime election results.
This means 10000 status updates that mentioned a break-up. I did not guess that at first and was surprised how many of 10000 random updates could have been breakups...
Probably looked at relationship status changes. I'd personally be interested in seeing the opposite -- i.e., peaks in people starting relationships, as well as the inter-arrival periods of relationships.
Anyway, I called Amex and they wouldn't tell me mine...