Update (5/15): LivingSocial has an Audible Voucher for 2-Months of FREE AudioBooks (new sign-ups only)
Amazon Local has a free coupon that entitles new Audible.com customers to 3-months of Audiobooks for $1.95 per month, which is a savings of $39 over that time period.
At the end of the promotion your account will continue at the retail price of $14.95, but don’t worry because you can cancel your membership anytime before the price increase and you will not be penalized. Audible has over 150,000 audiobooks available for streaming on a smartphone, tablet, laptop, iPod or computer. Only available for new customers, includes one audiobook a month, and the coupon expires on May 23rd.