I didn't see the movie and after reading about it I'm not sure I even want to.
Apparently the movie is about some environmentalist that strikes a deal with a department store (Huckabees) to sponsor him in his environmentalizing, he soon goes farther than they bargained for and is planting trees in the middle of their parking lots and whatnot. Lilly Tomlin and Dustin Hoffman play existential detectives for some reason. Also, Jude Law, Marky Mark and Naomi Watts are in it.
Now, what all of that means I'm not really sure but apparently Lilly Tomlin and the director - David O. Russell did not get along very well.