JetBlue released another promotion whereby if you fly now, you can fly again in the future at a discounted price. Here's how it works:
Register for the promotion first. Then, purchase a ticket between now and May 27, for travel dates May 19-June 23, 2009. You will then receive an electronic $50 off voucher good for a future airline ticket for travel between September 9 and November 15, 2009.