NEW YORK, Jan. 11 /PRNewswire-FirstCall/—DemandTec, Inc. (Nasdaq: DMAN), a leading provider of on-demand optimization solutions for retailers and consumer products manufacturers, today announced the launch of its nextGEN Assortment Optimization software service, part of the suite of next generation customer-centric merchandising and marketing solutions showcased at the National Retail Federation 99th Annual Convention and Expo January 10-12, 2010 at the Jacob K. Javits Convention Center. This major upgrade in functionality helps....