It seems when I go to Synaptic, mark for complete removal task-enlightenment for example it does not remove the entire 135mb package. It just removes the shell (I assume).
+1 to what menotu said. Any of the "task-" packages are meta-packages. That is, they are helpers to install a large set of packages like java or the e17 desktop. Removing the task-whatever package simply removes that one package only.