http://articles.sun-sentinel.com/2009-11-17/news/0911160344_1_immigration-experts-immigrants-show-banco-aztecaMIAHUATLAN, Mexico — During the best of the times, Miguel Salcedo's son, an illegal immigrant in San Diego, would be sending home hundreds of dollars a month to support his struggling family in Mexico. But at times like these, with the American economy out of whack and his son out of work, Salcedo finds himself doing what he never imagined he would have to do: wiring pesos north.Unemployment has hit immigrant communities in the United States so hard that a startling new phenomenon has been detected: Instead of receiving remittances from relatives in the richest country on earth, some down-and-out Mexican families are scraping together what they can to support their unemployed loved ones in the United States.