Any more specifics on this? I tried booking a $64 one-way on the site today, and the fine print right on the booking page still said $100 change fee. Obviously the change-fee-wipes-out-the-ticket problem is not nearly unique to jetBlue (with change fees of $150, most US majors wipe out even more expensive tickets), but I am interested to see how and when jetBlue will implement their new policy. I highly doubt anyone else will follow suit.