Hilton HHonors, the loyalty program for Hilton Worldwide’s ten distinct hotel brands, today announced its latest global promotion, More Nights, More Points. From January 3 through March 31, 2011, members can receive up to quadruple points after completing stays at participating Waldorf Astoria Hotels & Resorts, Conrad Hotels & Resorts, Hilton Hotels, Doubletree, Embassy Suites Hotels, Hilton Garden Inn, Hampton....