JetBlue is having Madness in March Sale which will give you really Cheap Fares on JetBlue Airlines. It is only a one day sale.
You can get fare as cheap as $49, I even found some $39 fare to make some really Cheap Flights.
These airfares are real cheap, not available anywhere else, and Include taxes/fees.
You can Book through 21st March for Travel from 27th March till 20th June 2012.