American Express cardmembers can get $25 off plus 50 JetBlue TrueBlue points when you book and pay for a roundtrip JetBlue flight with any American Express card by May 13, 2008. Travel must be completed by June 18, 2008 and there are blackout dates May 23 through May 26, 2008. The offer is valid once per itinerary, regardless of how many flights or passengers are booked and must be booked through http://insideflyerus.wpengine.com/link/?925
Since TrueBlue members can claim a roundtrip flight with 100 points, this offer will get you half way there.