The GroupWise Checklist feature has been greatly expanded and enhanced, and renamed the Tasklist. Tasklist items can be found in the Tasklist folder, but can also be placed in other folders, including the Mailbox and Calendar. For more information, see Section 5.0, Tasks and the Tasklist.
You can better manage your tasks by creating subtasks. Current tasks can also be moved to from a subtask locations. See Using Subtasks to Organize Your Tasklist Folder.