Through Dec. 12, 2010, Aeroplan members can earn up to five times the normal mileage earning rate at select retailers. The retailers offering quintuple miles will change every week. Visit http://www.aeroplan.com/eStore to shop at over 150 retailers. You can also follow the eStore on Twitter to receive advance notice of the bonus offers at http://www.twitter.com/AEROPLANeSTORE