Italy's Hot New Couturier Has an Unfamiliar Ring By RACHEL DODES and SUNGHA PARK February 21, 2008; Page B1 In a recent advertising spread in Italian Vogue, a model poses while the contents of her handbag -- including several cellphones -- spill into the street. A caption explains that she is wearing "tutto Derercuny." Not quite "all Derercuny." There is Samsung in there, too. Unbeknownst to many followers of high fashion, Derercuny, a three-year-old Italian label that is garnering attention during this week's Milan fashion shows, is part of South Korea's sprawling Samsung Group. Best known for Samsung Electronics Co.,...