I don't remember where I saw this, but I think I saw that the 7 dwarfs will be there this year (2010) I copied this from another board (I hope that is ok, but trust me it isn't nearly as cool as this one) apparently it was a press release about the event.
Mickey's Not-So-Scary Halloween Party at the Magic Kingdom is a perennial guest favorite for the character meet and greets, special entertainment, and of course, the candy. If you are planning on attending any of the parties this year, you'll want to check out this nifty guide we've compiled. We've even included a few things you won't find on any Disney provided guide:
Treat Trails (Candy Stations)
Trader Sam's Tiki Treats " Jungle Cruise Landing
Louis Gator's Bayou Goodies " Riverboat Landing
Pirate's Booty Treats " Pirates of the Caribbean queue
Woody's Happy Harvest " Diamond Horseshoe
Peter's Candy Flight " Peter Pan extended queue
Br'er Rabbits Laughing Place Candy Patch " Splash Mountain queue, features 3 candy stops
Pinocchio's Candy Closet " Pinocchio's Village Haus Patio area (Werthers)
Max's Pit Stop Treats " Speedway between the Merchandise cart and the Tea Cups
Town Square Theater " Exit of Mickey & Minnie meet and greet
Buzz Lightyear's Candy Blast " Buzz Lightyear meet and greet area
Tour Guide Gardens " Exit of Duffy meet and greet
Stitch's Spaceport Snacks " Tomorrowland Plaza (by Space Mountain FastPass)
Stitch's Great Escape Treats " Stitch's Great Escape (not advertised)
Turnstiles
Tomorrowland Terrace " Kellogg's and Disney Interactive
Kiss Goodnight Treat Trough " Available after first parade
Special Event Entertainment
Mickey's Boo-To-You Halloween Parade " Magic Kingdom Parade Route " 8:15pm and 10:30pm
Happy Hallo'Wishes' - Park Wide " 9:30pm
Villian's Mix & Mingle " Castle Stage " 7:45pm, 8:50pm, 10:05pm and 11:15pm
Stitch's Club 626 Dance Party " Rockettower Plaza Stage, Tomorrowland " featuring: Goofy, Pluto, Chip, Dale and Stitch " Continuous 7:00pm to 12:00am
Woody's Happy Harvest Dance Party " Diamond Horseshoe, Liberty Square " featuring: Woody, Jessie and Bullseye " Continuous 7:00pm to 12:00am
Character Meet and Greets
Mickey and Minnie " Town Square Theater, Main Street " Continuous 7:00pm to 12:00am
Disney Princesses " Town Square Theater, Main Street " Continuous 7:00pm to 12:00am
Duffy the Disney Bear " Tour Guide Gardens, Main Street " Continuous 7:00pm to 12:00am
Pooh and Friends " Flag Pole Planter, Town Square, Main Street " Cntinuous (except for Parade times) 7:00pm to 12:00am
Disney Villian's " Castle Hub " Continuous (except for Parade times) " featuring: Captain Hook, Step Sister & Lady Tremaine, Lotso, Jafar, Hades, Gaston
7 Dwarfs " Splash Mountain Exit, Frontierland " Continuous 7:00pm to 12:00am
Madame Carlotta and Rinotta (back to back) " Haunted Mansion lawn -Liberty Square " Continuous 7:00pm to 12:00am
Tiana and Naveen " Enchanted Glade, Liberty Square " Continuous 7:00pm to 12:00am
Tinker Bell and Disney Fairies " Adventureland Veranda, Adventureland " Continuous 7:00pm to 12:00am
Donald and Daisy " Gazebo outside Veranda, Adventureland " Continuous (except for Parade times) 7:00pm to 12:00am
Timon and Rafiki " next to Swiss Family Treehouse, Adventureland " Continuous 7:00pm to 12:00am
Tarzan, Jane and Terk " Veranda Porch, Adventureland " Continuous 7:00pm to 12:00am
Aladdin, Jasmine, Genie and Abu " Next to Carpet ride, Adventureland " Continuous 7:00pm to 12:00am
Alice and Mad Hatter " Mad Tea Party, Fantasyland " Continuous 7:00pm to 12:00am
Buzz Lightyear " Galaxy Gate, Tomorrowland " Continuous 7:00pm to 12:00am