The U.S. Conference of Mayors, and the Washington-based nonprofit Association of Community Organizations for Reform Now (ACORN) were the key sponsors for a discussion on foreclosures across the country. Mayor Michael Nutter’s Philadelphia Foreclosure Model won praise from mayors that included Manny Diaz of Miami and Antonio Villaraigosa of Los Angeles . There were several other prominent people involved in the conference call, including Bertha Lewis, CEO and Chief Organizer for ACORN, Mayor Michael Bloomberg of New York City , Dan Lindheim, Oakland Finance & Management Agency (spokesman for Mayor Ron V. Dellums of Oakland), California , Mayor Francis Slay...