The CW show "Gossip Girl," which ended its run this week, had been a boon for high-tech advertisers seeking sophisticated product integration. Verizon Wireless won exclusivity in a four-way battle against rivals to place phones on the show. Microsoft and Hewlett-Packard also jockeyed for position because the show went beyond brand recognition to product demonstration in a world of evolving technology. "It was really about showing features on a device. We [usually] do about between six and eight scenes in a season of 'Gossip Girl' ... where the characters are using their devices," says Barbra Robin of the CW.