Everyone is complaining about the 737-900er on here, I know from a pilots prospective it is not even close to the 757 and from a passenger perspective its not as comfortable as an A320/321, but It will be a money making machine for Delta. It will have a very low if not the lowest fuel burn per seat mile of any Delta plane, and there are a lot of great routes for it that don't require the performance of the 757. We will still have a lot of newer 757s left for anything the the 900er can't accomplish. At only 100 orders that still leaves 100 NB replacements Delta still needs. They found an immediate fix for aging planes, and the 100 deliveries starting in 2013 will allow them to sit back and and wait and see if the geared turbofans pan out on efficiency. I'm sure they got a smoking deal on them as well, so I say it is a great decision.