Around the nation — April 9, 2009(AP) U.S. Sen. Roland W. Burris says he's rung up $500,000 in legal expenses tied to investigations surrounding his appointment by indicted former governor Rod R. Blagojevich.Burris was appointed by Blagojevich in December to Barack Obama's former Senate seat, three weeks after the then-governor was arrested on federal corruption charges.Burris was sworn in in mid-January, and …