Now is the time for a mileage run

Many of ExpertFlyer's subscribers use the service to plan "mileage runs" or basically flying for the sole purpose of earning miles to gain elite status for the next year.  Now that many airlines such as American and United are offering double elite-qualifying miles, your mileage run dollar will take you even farther now.  Scott McCartney, a travel reporter for the Wall Street Journal talks about this and other changes in the elite landscape in his latest "The Middle Seat" column.