The Digital version of the Farsight Tau supplement comes out the 20th, while the hardcover comes out much later.
Photos have been posted on 3++.
I have to agree with the general sentiment that it would be nice if these were new army lists, not just new fluff and wargear. And full price as a digital dowenload is a lot to bear. There should be a discount for buying a hardcover AND a digital download.
Loken