From my little discount book:
Premium Passports get 15% at the following dining locations:
Bengal BBQ
Blue Bayou
Blue Ribbon Bakery
Cafe Orleans
Carnation Cafe
Clarabelle's Frozen Yogurt
Daisy's Diner
French Market
Hungry Bear
Plaza Inn
Pluto's Dog House
Rancho del Zocalo
Redd Rockett's Pizza Port
Refreshment Corner
River Belle Terrace
Stage Door Cafe
The Golden Horseshoe
Tomorrowland Terrace
Village Hause
Ariel's Grotto
Award Wieners
Baker's Field Bakery
Bountiful Valley Farmers market
Burger Invasion
Cocina Cucamonga Mexican Grill
Corn Dog Castle
Cove Bar
Golden Vine Wine Bar
Pacific Wharf Cafe
Pizza Oom Mow Mow
Taste Pilots' Grill
The Vineyard Room
Wine Country Trattoria
Croc's Bits N Bites
Goofy's Kitchen
Hearthstone Lounge
Hook's Pointe
PCH Grill
Pool Bars (all hotels)
Steakhouse 55
Storytellar's Cafe
Surfside Lounge
The Lost Bar
White Water Snacks
Wine Cellar
Yamabuki
10% off select merchandise at most merchandise locations
EXCEPT Disney Vault 28, Jewel of Orleans, Silhouette Artist, Portrait Artists in New Orleans Square, Parasol Cart, and Crystal shops.
Special rates at DLR hotels
20% off all Guided Tours
DTD: 10% at the following locations,
AMC Theatres, Anne Geddes, Basin, BAB Workshop, Catal and UVA, Club Libby Lu, Compass Books and Cafe, ESPN Zone, Fossil, Haagen-Daz, Hair Wraps, House of Blues, Illuminations, Jamba Juice, LaBrea Bakery,
LEGO, Naples, Pearl Factory, Rainforest Cafe, Ralph Brennan's Jazz Kitchen, Something Silver, Starabilias, Sunglass Icon, Tom Kelly Caricatures, Tortilla Jo's, Wetzel's Pretzels. (There are exclusions and certain times and amounts discounts are available on some of these.)
Free Parking