Grocery stores
Qualifies:
Acme
Albertsons
Assi Plaza
Columbus Asia Market (Huaxin)
Dominick's
EE Mart (Virginia)
Food Lion
Fred Meyer
Garden Fresh Market
Giant (Ahold)
Gordon Food Services (GFS)
Grandmart
Grocery Outlet
Hannaford
Harris Teeter
HEB (HEB counts for me at College Station, #541)
Hy-Vee
Jewel-Osco
Joe Caputo & Sons
Kroger
Lotte Plaza
Lowes Foods
Market Basket
Meijer
Pathmark
Price Chopper
Ralphs
Ranch 99
Redner's
Safeway
Savemart
Shaws
Shopper
Shoprite
Stop and Shop
Super EE Mart/Freshworld (Virginia)
Super Fresh
Trader Joe's
Vons
Weis Markets
Whole Foods
Doesn't:
BJ Wholesale
Columbus Sunrise Asian Super Market
Lindt Chocolate
Super Target
WalMart
Gas & convenience stores
Qualifies:
7-Eleven
76
Butler's Orchard (<-- not a mistake, It doesn't count as grocery, but as gas/convenience in Germantown, MD)
Chevron Gas
Diamond Shamrock
Exxon
Getty
Hess
Irving
Marathon
Mobil
Shell Gas
Texaco
Innovative Vitality (supplements at a doctor's office in No. VA)
Doesn't:
Jiffy Lube (not a gas station, but their services don't qualify for the 3% rewards)
Quick service payment/Fast food restaurants
Qualifies:
AMC Foodcourt (Tyson Corner)
Arby's
Baja Fresh
Boston Market
Burger King
California Crisp
California Pizza Kitchen ASAP (in airport terminal)
Camille's Sidewalk Cafe
Centerplate concession stand at AT&T Park (in SF)
Chartwells at the University of Utah
Chick-Fil-A
Chipotle
Culver's Frozen Custard
Daphne's Greek Cafe
Denny's
Domino's Pizza
Don Pedro
Dunkin Donuts
Fazoli's
Freebirds
Great Steak & Fry Company
Hot Dog on a Stick
In N Out
Jack in the Box
Jamba Juice
Jimmy Johns
KFC
Krispy Kreme
McDonalds
Murphy's Deli
Nation's Giant Burgers
Noodles & Co.
Panera Bread
Pho Hoa Noodle Soup
Pick Up Stix
Pinkberry
Pizza Hut
Pizza Schmizza
Qdoba
Quiznos
Ritter's Frozen Custard
Round Table Pizza
Soda Vending Machine (particularly at Loews Hotel Philadelphia)
Sonic
Starbucks
Steak Escape
Subway
Taco Bell
Tokyo Joe's (Denver/Boulder CO chain)
Tom's Drive-In
Una Mas
Washington Nationals concessions (Hard Time cafe)
Wendy's
Which Wich
White Castle
Wow Deli (Rockville, MD)
Zo Sushi & Thai (Broomfield, CO)
Doesn't:
Asqew Grill
Boudin Bakery
California Pizza
Cantina Grill (Denver International Airport)
Canyon Dining & Bar (Yellowstone Nat'l Park, Wy)
China Star Restaurant (Bountiful UT)
China Taste (Ashburn VA)
Hunan Wing (Chinese takeout)
Ikea Restaurant
Kentucky Fried Chicken
King's BBQ Pit (Inside the Lancaster County Market in Germantown, MD...it's considered as a "Restaurant")
Marco's Pizza
Papa Johns
Pei Wei
Popeyes
Pronto Pizza Marcello's (Bountiful UT)
Ranch 1
Sweet Tomatoes
Sizzler
Telecommunications
Qualifies:
AT&T
Cingular Wireless (AT&T)
CallVantage (AT&T) Voip service
Earthlink
onesuite (recharged phone card)
Qwest
Reliance India Call
Sprint - qualified for my monthly bill on monthly autopay through the Sprint website, also for phone purchase through Sprint phone CSR
T-Mobile
USA Telephone (Teleblend)
Verizon (SoCal)
Verizon Wireless (at least in the Illinois market)
Verizon Wireless (Atlanta)
Vonage
Doesn't:
ResponsiveWeb VoIP
Sprint
Cable/satellite TV/Internet Service Providers
Qualifies:
1and1.com
Astound
Charter Communications
Comcast
Cox
DirecTV
DishNetwork
Qwest
Time Warner
TiVo
Verizon DSL (VERIZON INTERNET SOL)
Doesn't:
Video rentals
Qualifies:
Blockbuster
NetFlix
Doesn't:
Department stores
Qualifies:
Chicos
Dillard's
Filene's Basement
JcPenney (both in-store and online)
Kohl's & (www.Kohls.com ...)
Macy's
Mervyn's
Nordstroms
Nordstrom Rack
Sears
Sears Hardware
Sports Basement
Urban Behavior
While House Black Market
Doesn't:
Many (all?) boutique mall stores (Ann Taylor, Guess, etc).
Altrec (online)
Amazon.com
Bebe Outlet
Bed Bath and Beyond
Charlotte Russe
Finish Line
Forever 21
Fry's (Online)
FYE.com
Ikea
J Crew
Joann Fabric
Lands End (online)
Linens N Things
Marshalls
Newegg (Online)
Old Navy
Overstock(.com)
Rack Room Shoes
Ross Dress For Less
SuperMediaStore (Online)
Target
WalMart
Dry cleaners
Qualifies:
Bountiful Family Cleaners (UT)
Holiday Cleaners
Pure Cleaners (Kildeer, IL)
Doesn't:
Drugstores
Qualifies:
CVS
Drugstore.com
Kaiser Permanente's pharmacy
Medco (mail order Rx)
Prime Therapeutics (mail order Rx)
RiteAid
Roadrunner Pharmacy (specialty veterinary pharmacy)
Walgreens
ULTA
Doesn't:
Pro Health Inc.
ClinicalGuard
Movie theatres
Qualifies:
AMC (Austin, TX)
AMC IMAX (specifically the one in SF)
Century Cinemas 16
Century Cinemas (via Fandango)
Doesn't:
Local and suburban commuter passenger transportation
Qualifies:
Ferries, Bridges, Tolls, Parking Garages, Taxi's, Limo's, etc.
Long Island Railroad (LIRR TVM ...)
Metro-North Railroad (METRO-NORTH TVM ...)
NYC Subway (MTA MVM ...)
Washington Metro (WASH METRO ...)
Las Vegas Monorail
Boston Subway (MBTA)
Portland, OR TriMet
Southeastern PA Trans. Auth. - SEPTA (Philadelphia & suburbs)
Chicago Transit Authority (CTA) Ticket vending machines
Park Ride Fly (airport parking and shuttle service)
DULLES GREENWAY (Parking ticket)
Bay Area Rapid Transit - BART
Cherry Creek Kiosks (parking kiosks in Cherry Creek, CO)
Doesn't:
Academy Bus (NY/NJ)
Amtrak parking lot
FasTrak (Bay Area Toll Tags)
Greyhound Bus
MARC Commuter Rail (probably because ticketing is handled by Amtrak)
SFMTA (prepaid parking meter cards and muni passes from their website)
Boulder Parking (parking kiosks in Boulder, CO)
Pet supply stores and Veterinary services
Qualifies:
Animal Care Center in West Bountiful, UT
Petco
Southwest Animal Hospital (Beaverton, OR)
PETsMART
Knightswood Animal Hospital (Philadelphia, PA) part of VCA network
Pender Ventrinary (No. VA)
VCA Allpets Clinic (Boulder, CO)
Boulder Emergency Vet Clinic (Boulder, CO)
Doesn't:
Houston Humane Society
Utilities
Qualifies:
Eastern Propane and Oil
NJNG $5.95 fee
PG&E - with my chase freedom visa (not signature) with the points option - got ~75 points on ~25 points charge
PSNH
Waste Management
MXEnergy (natural gas)
City of Austin Utilities
JCP&L(First Energy) $3.95 fee
City of Peoria Water/Sewer/Trash (Arizona)
City of Phoenix Water/Sewer/Trash
Commonwealth Edison (charged a $3.50 fee)
Doesn't:
Seattle City Light ("SEA LIGHT WEB")
Santa Clara Muni Utilities (Silicon Valley Power)---considered to be govt services, not utility
Gym/recreation memberships
Qualifies:
Ballroom Dancing (to my surprise - this could potentially work for kids' dance lessons and such, which I'm sure would be a huge benefit to parents)
Gold's Gym
LA Fitness
Doesn't:
Bally's Sports Clubs
Beauty salons/spas
Qualifies:
Great Clips
Sport Clips
Supercuts
The Barbershop and Compa (Springfield Mall, VA)
Hot Sulphur Springs Resort (Hot Sulphur Springs, CO)
Northern VA Massage Center
Hair Cuttery
Paradise Cuts (No. VA)
Doesn't: