[O] Hiding "future" tasks in tags-todo agenda view

[Neilen Marais]

Hi,

I've recently switched from using tracks (http://getontracks.org/) to
org mode for GTD task management. One neat tracks feature that I am
struggling to reproduce is the "show task from date". If you add a
task with no date set, they show up immediately in the context next
action lists, but if you have a "show from" date in the future, it
only shows the task from that date onwards.

Scheduling timestamps (http://orgmode.org/worg/org-faq.html#sec-16-9)
seem like they should do exactly that, but they don't seem to work in
my custom org-agenda that I use to show only items with a NEXT todo
state and an assigned context. However, it shows all items
irrespective of the scheduling setting. 

(setq org-agenda-custom-commands
      '(
        ("c" "Context Next Tasks" 
         tags-todo (mapconcat 'car my-org-context-tag-alist "|")
         ((org-agenda-skip-function '(org-agenda-skip-entry-if 
                                      'nottodo '("NEXT")))
          (org-agenda-sorting-strategy '(tag-up))
          (org-agenda-overriding-header "Context Next Tasks")
          ))
))

How can I make this custom agenda skip items that are scheduled in the
future, while also keeping unscheduled tasks? I have also tried adding 
          (org-agenda-entry-types '(:scheduled))
but that did not seem to make any difference.