All Ears has a lot of errors, but here is the link for TIW (formerly DDE). It's pretty accurate as it has new restaurants on there that were just added to TIW a few weeks ago:
http://allears.net/din/dde.htm
Quick answers to your questions:
-It is not accepted at T-Rex, nor Rainforest Cafe
-Is good at most TS restaurants (need to check the list, as some non-Disney owned restaurants at Downtown Disney and Epcot do not participate)
-Is good at several CS locations (Port Orleans, Values and Animal Kingdom)
-Is not accepted at snack locations, but you can use it for juice snacks and dessert snacks while dining at a TS restaurant (eg. you can order an extra bottle of water during dinner to carry around parks. You are subject to an auto 18% gratuity though)
- We used it for Fantasmic a few years back, but I'm not sure if it's still available, so I'll let someone else answer that one for you
Good luck and happy eating, Tiger
