The directing team JJ & Maithy has signed with New York's Hornet for commercials representation. ... Senior art director Eduardo Nieuwenhuyzen has been promoted to associate creative director at St. Louis agency Drive. ... Gustavo Lopez, formerly of del Rivero Messianu/DDB, has joined Hill, Holliday Hispanic in Miami as a senior copywriter. ... In April, colorist Seamus O'Kane will jump to The Mill/London from crosstown rival VTR.