Calendar feature would be great and eliminate syncing issues and delays.
Also would it be possible to add location fields or person responsible?
You can sync your tasks with any calendar (view only) using our iCal feed as shown in this video: http://www.youtube.com/watch?v=gzGubOy8GuE
You can also add location and the name of the delegated person using labels. Simply type @work @John within the task's name and you can always click on a label to see all tasks associated with it or search for tasks with a specific label or exclude tasks with a label using the advanced search options.