Fuelfrog is a web service for tracking your gas mileage and cost-per-gallon trends which can provide insight into your empty wallet. By adding simple information each time you fill up your car, Fuelfrog will chart that data to provide a gas history.Fuelfrog accepts updates via its website, but it also can accept data via Twitter direct message. Simply add your Twitter account to your Fuelfrog profile and Twitter the miles since your last fill up, price per gallon, and number of gallons purchased to @fuelfrog.
Someday you'll be able to log in to Fuelfrog and tell your children, "See, back in my day I only paid $4.00 for a gallon of gas!"
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