Version 1.5 and above support Task Templates, the ability to create new tasks from saved template tasks.
To create tasks at the top level from a task template, click the New From Template link at the bottom of the Home Screen.
To create sub-tasks at any level from a task template, click the New Task(s) From Template for the task you want as the parent task.
Clicking either of these options will give you a pop-up window you can use to select the template you want to use to create your new tasks. Click on the template you want, and your new tasks will be created from that template.