Continental's Cleveland hub is compact and easy to get around in, and has a good flight schedule to the Northeast and Midwest. It probably won't ever get as big as Delta's Cincy hub or US Airways at Pittsburgh, becuse the property is too small and hemmed-in by factories, a convention center, and expressways, for widely-spaced runways.
Cleveland and the suburb that abuts Hopkins Airport, Brook Park, settled a bloody war over airport expansion a couple of years ago, with an agreement that had Brook Park cede some land to the airport to allow a new main runway that is long enough (11,000 ft) to acommodate fully-loaded jumbos to Europe. But the new runway won't be widely-spaced, so capacity won't rise much.
Need a new airline paint scheme? Better call Saul! (Bass that is)