At DTW I have heard from the ticketing agents that Continental will be moving to the new North Terminal in the early Fall as they transition out of SkyTeam and into Star Alliance. Right now they use three gates on the B Concourse and one gate on the C concourse for regional get operations. The North Terminal at DTW has open gates.
As for ORD, I have been told by the Presidents Club and the World Club Agents that Delta is moving to the Northwest gate area and the WorldClub/Presidents Club will become an excluse Delta SkyClub this summer or fall.