We saw Chicken little at MGM, but that was about 2 months ago. He was in the Magic of Disney Animation tour.
The Incredibles seem to have a semi-permanent home across from Stitch's Great Escape at the Magic Kingdom. Behind Buzz Lightyear. Also there are usually Stitch and Buzz.
Incredibles are meeting inside the entrance to the old TimeKeeper ride, usually with Stitch and Buzz Lightyear. Mr. and Mrs. Incredible are out often, but Frozone doesn't seem to be around much anymore.
Chicken Little and Abby Mallard are inside the Animation Building at MGM. You can visit them by cutting through the Animation gift shop and going through the hallway in the back. The entrance to the gift shop is to the right of the entrance to the Animation Tour. You can also take the Animation Tour, and it lets out inside the room where Chicken Little and Abby are.