I just received an email from Jetsetter with a $25 off promotion code for all reservations booked within the next 48 hours (minimum reservation must be $300+). To make the deal even better, there is an Amex Offers promotion where you can get a $20 statement credit with a $100+ Jetsetter.com transaction on a registered American Express credit card (read more about this promotion here). So on a $300 reservation, you can save 15%.
To take advantage of the $25 off, use code MEMORIAL by 11:59pm ET on May 24, 2015.
For anyone that is able to take advantage of this deal, enjoy!