the Extra Magic Hour is the same as the Early entry days were, so the advantages are the same . Here is the list of days for you
Sunday- MK
Monday- Animal Kingdom
Tuesday- MGM
Wednesday- Epcot
Thursday- MK
Friday- Animal Kingdom
Saturday- MGM
Here is the list of rides that are schduules to be open (of course these are subject to change but...):
Magic Kingdom:Astro Orbiter, Buzz Lightyear's Space Ranger Spin, Cinderella's Carrousel, Dumbo , it's a small world, Mad Tea Party, , Peter Pan's Flight, Snow White's Scary Adventures, Space Mountain, The Alien Encounter, The Many Adventures of Winnie the Pooh, Tomorrowland Speedway, Tomorrowland Transit Authority
Epcot:Spaceship Earth, Test Track, Universe of Energy
Disney-MGM Studios: Muppet*Vision 3-D, Rock 'n' Roller Coaster , Star Tours, Tower of Terror
Disney's Animal Kingdom: Discovery Island Trails, It's Tough to be a Bug!, Kilimanjaro Safaris, Pangani Forest Exploration Trail, The Tree of Life