If you add due dates for tasks, it would be great to have a calendar and a list view with all upcoming and completed tasks for your team mates. It would make planning and reporting a lot easier, as you could see who is doing what. Also if you could add tasks to emails threads, conversations and contacts, then you would need a unified place to see all your tasks, created in different places. This calendar could be synced with Google and iCloud calendar or could have an url which you can add to these services.
