Prognosis tools, forecasts.
How did I do with sponsor X this last September 2009 in comparison to September 2008?
How do I usually perform on payday weekends? Assume that people at least get paid once a month, on or before the last weekend of the month. Let me compare the first Monday of each month and see how I usually do, and from that build a 95% confidence interval of estimated income.
A tool to forecast, that if traffic from source X is converting at Y%, how much would I be willing to pay for that traffic or ads that bring in that traffic?
It's called "Nifty Stats" damnit, let's make it all about stats.

More statistics to the people!