Thanks to Alex Zois for providing me with this footage!
Sorry I'm a little late in posting this. On September 23, JetBlue officially had their first flight of their new A321neo aircraft, with service from JFKFLL! The aircraft is configured with a single class, all core layout. The A321 was delivered in June from Airbus' production plant in Hamburg, Germany and has been undergoing FAA inspections and testing until recently, when JetBlue added the aircraft as a reserve AC several days prior to the inaugural flight shown in this video. This is a big step forward for JetBlue, and I personally look forward to flying their NEO soon!
Enjoy the water cannon salute, special announcements, etc, typical of an inaugural flight.