Chicago--Whittman-Hart and USWeb/CKS said Friday that it has hired VSA Partners, Chicago, to handle a branding campaign for the just-merged companies. McKinney & Silver, Raleigh, N.C., has also been tapped by the duo to manage global advertising and other marketing programs. Both companies specialize in developing and implementing Internet strategies for businesses. They announced plans to merge on Dec. 13 and completed the merger Wednesday. It said the combined companies would announce a new name March 23. The brand and advertising campaigns are scheduled to kick into gear later in the year.