As I mentioned in another post, Delta recently changed our flight from an MD-88 to a Comair regional jet (50 seater). When I pull up our itinerary, our seat assignment is "not assigned". Will seats be assigned at some point, either before or at the time of check-in? I hate the idea of a mad scramble for seats with 2 young children. I know you good people on this board will have an answer for me - thanks.