How do you link directly to a wall post under the Facebook Timeline view of things?
With the old Facebook profiles, you can use Firebug (a Firefox add-on) to look at the wall post, and get the object_id.
With a Timeline profile, there is no object_id, rather there are:
contentid(sometimes negative)contextwindowstartcontextwindowend
None of them work when placed in a direct link URL, e.g. http://www.facebook.com/[profile-username]/posts/[object_id].
Best Answer
All you need to do to link directly to a post from the timeline is to click on the timestamp that shows you when it was posted.
That permalink will take you to a page featuring just that update and any comments attached to it.