When we were there in Oct. '04, the first stop for Future World (in front of Spaceship Earth) was about 9:45, I think. Anyway, we timed just right that it was driving around SE as we came out of the SE ride. There were very few other people around. There were TONS of characters! Jiminy Crickett (who I'd read here is pretty rare), Pinochio, Mickey, Goofy, Max, Baloo, King Louie, Chip & Dale, Mary Poppins, Captain Hook, Mr. Smee, Pluto, Rafiki, Meeko, etc. When Jiminy Crickett got off the bus, he grabbed my DDs hand & they skipped off together. The characters split up around the Leave a Legacy tile monuments. It was easy to form lines there. It was fun seeing who was around the next corner. We were able to visit with all of the characters we wanted to. We had already had pictures with some of the characters at other places. I felt that the character interaction there was better than almost anywhere else we went!
Oh, you may already know this, but Mickey & Goofy appear outside Mission:Space dressed as astronauts. We just learned about that by luck. I had riden MS first and was sitting on the wall outside the ride with our two kids while DH rode. A CM came by & told us to walk over to this particular area where Mickey would soon come out. And when he appeared, he had Goofy with him! And we were first in line! Awesome!