In the Walrus and Carpenter sequence of Alice in Wonderland, the specific dates on the calendar (like the first falling on a Monday) match March 2010's dates...when Disney released Tim Burton's version of Alice and Wonderland.
A-113 is a number you see pop up in a lot of Disney and Pixar movies, like this image in Finding Nemo. It's an inside joke referring to a classroom at CalArts, where a lot of animators learned their chops.
The wizard from The Sorcerer's Apprentice was modeled heavily after Walt Disney, especially the facial features. The stern look the wizard gives Mickey is the same look of disapproval Walt would give when he didn't like someone's work. They even named the wizard Yen Sid...Disney spelled backwards.