The Delta-Northwest merger will cost the Twin Cities a corporate headquarters. But if it’s any consolation, we will remain home to the merged airline’s in-flight magazine. MSP Communications formally said today that it’s been selected to publish the new Sky magazine. (MinnPost broke the story Dec. 2.) MSP currently publishes Northwest’s World Traveler, as well as Mpls.St.Paul Magazine and Twin Cities Business. The Delta deal will inject more than $50 million into the local economy over the next five years and create 25 new jobs, the company said. The first issue will appear on planes in April.