Colorado Springs as a hub? Come on now, it's a nice place to visit, but it's not a major metropolitan area (yes, I know it's an hour and a half away from Denver; it's just my personal opinion). Continental's philosophy has always been to build it's hubs to where ALOT of people want to go (especially business travelers). COS is a nice place to visit, or even to do some business, but it's not a place for a hub for a major airline such as CO.
However, I do agree CO should have a hub out west. CO right now has a stake in America West and a code-share agreement with Alaska. Maybe CO should buy/merge with one of these two, gaining either a hub at Phoenix/Las Vegas or Seattle/Portland respectively.
As for JFK, I certainly hope CO continues to expand it's presence there. Now that IAH-JFK routes are on-line, I'm sure we'll be seeing a CLE-JFK route soon, also.