Remeber the Milk and Google Calender . Seamless
If you use Google Calender and need a task list try remeberthemilk.com - this now has a one button seamless integration feature. You end up with the RTM task list inside your colander.
What with this and it's great mobile interface compliment, RTM could be just be the missing gap in the personal task list/Google App vicinity.
This is the online calender equivalent of ancient man discovering the seasons. Only free.