The FASTPASS attractions are divided into two groups, and you can get two instant FASTPASSes from each group (for a total of 4 FASTPASSes) (again, these are unconfirmed):
Magic Kingdom
◦Donald: Big Thunder Mountain Railroad, Many Adventures of Winnie the Pooh, Peter Pan's Flight, Space Mountain, Splash Mountain
◦Daisy: Buzz Lightyear's Space Ranger Spin, Jungle Cruise, Mickey's PhilharMagic, Stitch's Great Escape!
Epcot
◦Donald: Soarin', Test Track
◦Daisy: Honey, I Shrunk the Audience, Living with the Land, Maelstrom, Mission: SPACE
Disney's Hollywood Studios
◦Donald: Rock N Roller Coaster, Toy Story Midway Mania, Twilight Zone Tower of Terror
◦Daisy: Lights Motors Action Extreme Stunt Show, Star Tours, Voyage of The Little Mermaid
Animal Kingdom
◦Donald: Expedition Everest, Kilimanjaro Safaris
◦Daisy: Dinosaur, It's Tough to Be a Bug, Kali River Rapids
In general, you will get at least 2 FASTPASSes per card from each group - that is, two FASTPASSes for any combination of Donald rides, and two FASTPASSes in any combination of Daisy rides. Lately, it has actually been four FASTPASSes per group, but the system is flexible it could change at any time.
In addition, some people have reported not being able to get more than one FASTPASS at the same attraction with the same card, but as of last report this is allowed - especially since there aren't necessarily four attractions in a group.