I recently had a chance to check out one of Delta's new Boeing 717's. Delta started aquiring these aircraft from Airtran in 2013 and they now fly many of Delta's old DC9 routes. The 717 is the smallest mainline aircraft in Delta's fleet with 12 seats in First Class, 15 seats in Economy Comfort and 83 seats in Economy. First is configured in a 2-2 setup and coach is 2-3, similar to the MD80 fleet.
For my flight I was seated in 1B and my companion in 1A. It was a short flight from St. Louis to Detroit and I think this is the perfect flight for this aircraft.