That is correct, our friend the woodchuck chucks nothing. It is, like I said, something between a riddle and a childrens rhyme or something, and it was also in one of the Monkey Island games. To explain further, here is the original version (I think I got it right):

How much wood would a woodchuck chuck if a woodchuck could chuck wood?

As you can see, it is another one of those She sells seashells at the seashore... toungedamagers. :)

And the reply, in English instead of in perl-compilerish, is as follows:

A woodchuck would chuck no amount of wood, since a woodchuck can't chuck wood.

Hope that makes it a bit clearer... :) And thanks!

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You have moved into a dark place.
It is pitch black. You are likely to be eaten by a grue.