If you are talking only about rides, and you are not able to transfer out of the wheelchair, you will only be able to ride those that have wheelchair accessible ride cars.
If you are also interested in movies or show and other attractions, there are more things you can do.
Epcot
Ellen's Energy Adventure
Advanced Training Lab at Mission Space (interactive group game)
Innoventions East and West(displays and interactive displays)
The Seas with Nemo and Friends
Turtle Talk with Crush (show)
Living with the Land (as mentioned, currently closed)
The Circle of Life (movie)
Journey into Imagination with Figment
Image Works (interactive displays)
Honey, I Shrunk the Audience (3D movie)
Gran Fiesta Tour Starring the 3 Caballeros
Reflections of China (360 movie)
American Adventure (movie and show with audioanimatronic figures)
Impressions de France (270 movie)
O Canada (360 movie)
MK
Railroad
Magic Carpets of Aladdin
Jungle Cruise
Country Bear Jamboree (show with audioanimatronic bears)
Hall of Presidents
Liberty Square Riverboat
It's a Small World
Mickey's Philharmagic (3D movie)
Many Adventures of Winnie the Pooh
Carousel of Progress (audioanimatronic show)
Buzz Lightyear's Space Ranger Spin
Stitch's Great Escape
Monsters Inc Laugh Floor
Studio
Great Movie Ride
Sounds Dangerous
Indiana Jones Epic Stunt Spectacular
Muppet Vision 3D (3D movie)
Lights, Motor, Action Extreme Stunt Show
Studio Backlot Tour
Toy Story Midway Mania
Magic of Disney Animation (movie and interactive displays)
Playhouse Disney Live on Stage (interactive show with stars of Disney preschool shows)
Beauty and the Beast (live stage show)
Fantasmic (multimedia and live night show)
Animal Kingdom
It's Tough to Be a Bug (3D show)
Discovery Island Trails (displays and animals)
Festival of the Lion King (live stage show)
Kilimanjaro Safari
Pangani Forest Exploration Trail (animals and displays)
Wildlife Express Train
Rafiki's Planet Watch (interactive displays)
Flights of Wonder (live bird show)
Maharajah Jungle Trek (animals and displays)
Finding Nemo - the Musical (live action musical show)
Also, you can check on post #3 of the disABILITIES FAQs thread for some links to past threads about touring with a wheelchair.