Fret not, loyal reader. After I complete the Death Knight Experience you can expect me to delete my Dwarven DK and start anew. I'll take plenty of screenshots for you then.
In the screenshot you can see the back of my DK, to include that beautiful runeblade on his back. The Val'kyr Battle-Maiden before me is one of two
Make sure you scroll down past the screenshot, as I'll let you know about the integrated threat meter, or at least what I saw of it.

As for the threat meter, I'll have to get a picture taken and post it later. It is pretty sleek, but I think it is a little hard to see if you're not used to it. In between your character portrait and health/runic power bars, there is just enough space for a diamond to appear. This diamond turns yellow when you are targeting an enemy in which you appear on its threat table. It gradually becomes more red the higher you get.
I apologize now for not having more details about that. I will pay a little more attention to it the next time I hop on.