Using the task manager on Gmail is a result of a Google Labs "experiment" that loads a simple Task List box in your Gmail window. Users can then add to-dos to their list, complete with "Notes" and a "Due Date." Upon completion a user can cross through a task, to see what he or she has already completed, and later "clear completed tasks" to do just that.
Using Google's new web-based Tasks application, a user can view and edit their task list on-the-go from their web phone (currently iPhone and Android). This iPhone optimized site is simple, but elegant, (more elegant than the Full Sized Gmail Task List) and allows a user to view the tasks they've entered using Gmail or view their iPhone tasks using their PC.

Finished with a task? Use your iPhone to mark it off and rest assurred that wherever you have internet access, your Google Task list will be updated.
What's the hold up, Apple?
Thank you Google.
