This tends to come up from time to time. Unfortunately the solution/capability is hard to search for until you know the solution is called Permalink.
link 1 link2 link3
It's veja-du all over again
.
I'm guessing the very old request Rich said he was going to inquire about regarding changing the text for "Permalink" to "Link this post" was denied. Shame, since that's much more intuitive.
-Dave