JetBlue is having a two day sale with fares starting at $55 each way. Reservations must be booked by Wednesday May 21, 2014 at 11:59pm EST for travel June 3 through September 25 (blackout dates: June 25-July 7).
I looked at a few random routes and fares seemed to be pretty decent, so if you have any upcoming travel you are looking to book it is worth taking a look. The terms state for Tuesday and Wednesday travel, but I was able to find decent fares throughout the week.
Also, if you already have a JetBlue reservation booked during this time, check to see if the fare went down. If it did, you can call JetBlue and they will give you a credit for the fare difference to be used for a future date.