I will answer both replies here.

The flight was #74 on 11/18/10.

The Customer Bill of Rights brochure I was given that day by a JetBlue agent stated that if a cancellation is due to a controllable irregularity & occurs within 12 hours of the scheduled departure, then JetBlue will additionally give you a travel voucher for future travel in the amount of the cost of the round trip. It appears that their Bill of Rights no longer is that generous, but I feel in good faith JetBlue should stand by the rules they gave me that day.