So, GRRM posted today in the blog that the upcoming anthology, Dangerous Women, will have (instead of a 4th Dunk & Egg story), a piece called The Princess and the Queen, which is:
http://grrm.livejournal.com/310198.html
well, it's some of that fake history I have been writing lo these many months, the true (mostly) story of the origins of the Dance of the Dragons.
http://grrm.livejournal.com/310198.html