As I posted yesterday, The Name of The Doctor is the culmination of a plot woven into Moffat's episodes since The Girl in The Fireplace (I was inaccurate in stating "six years" yesterday. It's been far longer.)
Since my previous post, the BBC has bargained for a reduction in spoilers, but that doesn't appear plausible.
There have been no revelations in the cause of this yet...
If you're in search of a spoiler-free refuge, the newly created "Doctor Who" page of this website is for spoiler-free discussion. As well, http://thetardismatrix.weebly.com functions as one.
You're probably dreadfully bored with my ramblings, so I suppose that I should cease until pertinent information comes to light.