Google Maps mashup Drive Pricing calculates the cost of a road trip. Just give Drive Pricing your zip code and car's average miles per gallon (if you don't know it, Drive Pricing provides a link to FuelEconomy.gov to find an estimate), then choose your start and end points and your preferred grade of gasoline. The site uses average gas prices in your area to determine the cost, so the results give you a great picture of what a road trip this summer will set you back. Drive Pricing might be worth consulting before you take that scenic summer road trip. Drive Pricing [via Download Squad]