They're also launching D1 on SAN-JFK once a day on the noon flight (they also have a morning and redeye) in mid-August to compete with jetBlue, who is launching Mint on the route on the midday flight. jetBlue does not look like it's selling Mint on their redeye yet.
SAN-JFK is actually going to be my first experience flying Mint this fall. The funny thing is the trip out to SoCal I am flying DCA-LAX which has been upgraded to DeltaOne, so it will be a good comparison trip.