-By David Gianatasio

BOSTON Interpublic Group's Mullen has expanded its relationship with travel site Orbitz.com, adding media chores on the business via its MediaHub unit, the client said today.

The client spent more than $60 million in measured media last year, per Nielsen Monitor-Plus.

Wenham, Mass.-based Mullen already handled creative duties on the business, which it won following a review in late 2006.

MediaHub succeeds WPP Group's MediaCom in New York on Orbitz's buying and planning.

The media chores shifted following a review; other contenders could not immediately be determined.

"We're enthusiastic that MediaHub will help guide, develop and execute our media purchasing to maximize the voice of our brands here in the United States," said Tom Russell, client group vp, brand marketing, the Americas. "We continue to treat the creative and media purchasing disciplines of our business independently, however, we expect to benefit from obvious synergies between these teams within Mullen."

Mullen's initial effort for Orbitz debuted one year ago and featured a "halo effect" in humorous commercials and the tagline, "A step ahead."