Ther has been a lot of additions since you've been there.
This list is going to be rather lengthy, but here it goes:
Magic Kingdom:
1) Buzz Lightyear's Space Ranger Spin - Help Buzz battle Zurg in an arcade-style ride where the more Z's you shoot with your lazer cannon, the more points you get.
2) Stitch's Great Escape - You are part of a security operation where Stitch is put under custody, with bad results.
3) The Monster's, Inc. Laugh Floor Comedy Club - Mike and the gang tell corny jokes in an interactive attraction.
4)The Many Adventures of Winnie The Pooh - Ride in a honey pot on a ride based on Winnie the Pooh and the Blustery Day story.
5) Mickey's Philharmonic Orchestra - Arguably Orlando's best 3D attraction.
6) The Haunted Mansion - Maybe not a new attraction, but some great improvements have been made, in both visuals and much improved audio.
7) Pirates of the Carribean - Again, not new, but some great additions.
Disney Studios:
1) Rock 'n' Roller Coaster - Arguably Orlando's best coaster. My personal favorite attraction.
2) Extreme stunt show - great stadium show
Animal Kingdom:
1) Expedition Everest - Awesome new roller coaster.
2) Finding Nemo - Broadway-style play
3) Primeival Whirl - Tilt-O-Whirl meets roller coaster
Epcot:
1) Mission: Space - Incredible simulator that really makes you feel as if you're pulling major g forces
2) Turtle talk with Crush: Great interactive show. Great for kids, but adults like it too.
3) Soarin' - Great hang glider style simulator that is really a relaxing ride.
Journey into Imagination with Figment - This attraction gets tweeked every couple of years. It's OK
4) Mexican pavilion boat ride - Greatly improved attraction. Donald Duck and the Three Caballeros have been added to make this a rather amusing attraction.
A great source for information reguarding Disney World and other Orlando attraction is "The Unnofficial Guide to Disney World," which can be found at at your local book retailer (Borders or Barnes and Noble). The book also talks about local restaurants and hotels. Also check out allears.com.
Go to Disney World! Be Young! Have Fun!!!