I'm down to two days and have to fret about something I guess. My original reservation gave us a 55 min connection time in Chicago. We've been thru Chicago before - almost always delayed flights. We will be coming in on a regional jet (can't remember the concourse). I assume we will depart from a different concourse. Am I pressing my luck with only 40 minutes to change planes? PS Its this Friday so I am assuming most of the Sandy back up will be cleared by then.