Casper, I moved your post into a new thread, because it's kind of a different topic than the original thread.
I haven't seen anything about the iPhone OS 3 adding the ability for OmniFocus to run in the background, so we could only do something like this when OmniFocus was already running. Given that constraint, most folks seem to be pretty happy with the "hit a button and show me what I can do" approach the app currently uses. (Of course, if we get a bunch of demand for something that auto-scans for your location, we'd consider it. As always, email the
support ninjas to vote for that if you'd like to see it.)
We are planning some location-based changes once iPhone OS 3 is released, though - you no longer need to bounce out to the map application to show where an action is; you'll be able to get a map right inside of OmniFocus.