It seems that that the API method rtm.tasks.getList does not return tasks for smartlists;
it is implied that it should since rtm.list.getList includes
smartlists in the object it returns, and furthermore, smartlists do
have valid list_id values.

Is there a problem or is this intentional?

In any case, thanks for the great product.

Also posted this in Google Groups, not sure where you wanted it