Add Location Triggers
This can be very useful in two ways: Part of getting things done is context.
We can have certain tasks set to today but only when @work (which I attach locations to). Now when I am at work, it will only show any tasks on my today list that are associated with Today and @work or @anywhere
Second, ability to set some tasks to be location specific but time does not matter. So if I am at the store - it should give me a notification saying 'Buy xxxx'