Hi Jennifer,
I've taken advantage of free dining in the past, too, so I understand your angst in hearing if it'll be offered again for your travel dates. Although always subject to change, currently
Special Offers exist on the Disney website if traveling through June 12, 2013, and another new offer I see on the unofficial mousesavers.com with up to 30% off for Disney Visa cardholders traveling through August 14, 2013.
Mousesavers.com is a great resource for researching deals, and by searching "historical information on discounts," you'll find a chart of past discounts along with release and expiration dates. It's important to note, however, past discounts are not always predictions of future discounts.
Unfortunately we're not privy to which discounts will emerge or when they'll be released, but another great idea is to keep an eye on the Disney Parks Blog for announcements. Between the Disney Special Offers page, mousesavers.com and the Disney Parks Blog, you'll likely be one of the first fans to learn of the discounts.
Have a MAGICAL vacation, Jennifer!
Sherri