Matthew: Would you like to leave a message? chan board list * The end of the refinancing boom continues to shake up theU.S. banking sector, as Citigroup Inc said Monday it laidoff 1,000 workers in its mortgage business. Citi is the latestbank to cut back on its mortgage workforce in the wake of risinginterest rates, which have curbed consumer interest inpurchasing new homes and refinancing mortgages. ()