At&T Wireless Taps White Horse

White Horse, a Portland, Ore.-based Web marketing and design shop, has been selected by AT&T Wireless ( to create its online advertising. White Horse will work in partnership with media strategy agency Avenue A to develop AT&T Wireless’s online advertising and marketing efforts for the coming year. White Horse will provide marketing consultation, targeted online advertising and rich-media ad schemes. Avenue A will collaborate on campaign planning, targeting and data analysis.