6-12-12  --  Normally, summertime gas prices go up -- but this year, we're actually paying about 20-cents less per gallon than in June of 2011.  Minnesota-Gas-Prices-dot-Com reports our statewide average is down to 3-46 a gallon, which is also a dime less than the national average.  Minnesota, the Dakotas and Nebraska are among the states with the least-expensive gas right now.