One piece of functionality that is painfully missing from Google Apps is task tracking and sharing. Fortunately, Remember the Milk provides straightforward task tracking and sharing and it has seamless integration with Google Calendar.
According to their site, they have both a free and a paid premium plan. I am trying out the free plan now to see how stable it is. My main concern will be that the service has minimal downtime during business hours and low latency.
One very nice feature is the email integration. Each user is given a custom email "inbox". You can create new tasks by sending an email to your inbox. Better, you can use codes at the beginning of the email body to set attributes on the task.
For instance, you could send an email to your task inbox with the following email subject line and codes in the email body:
Subject: Friday's Task
L: Obtiva
P: 2
E: 1 hour
D: Friday
---
This is a note for my Friday task.
This creates a task named "Friday's Task", adds it to the Obtiva task list, gives it a medium priority (2), an estimate of 1 hour, and a due date of Friday. Also, there is a note attached to the task, "This is a note for my Friday task."
