I've moved the body of this post into the "Read More" section of this post, as I discuss a REALLY fun quest that you may want to experience for yourself w/o me spoiling it for you.
Edit: I can't get that working for now -- so click the thumbnail at your own risk!!!!11!eleven!!
I've included a picture, too -- it's unlike anything I've experienced in my 2.5 years of playing.
Great job, Blizz :)
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In the Outlands, there's a strange quest you have to complete that requires you to post at least five poles down on the ground and stand in the resulting beams of energy.
The catch is that the area is (of course) filled w/ monsters, the poles can't be within a specific distance of one another, and that they only last a few minutes.
It took a little bit of creative mob-avoidance and a good deal of outright killing to get this done, but it was well worth it.

