Desiring God is publishing their own books now. I know Piper is a Logos user and I hope that you guys are working to make sure that we get access to their new books.
They recently published Think It Not Strange. They are giving it away in .epub, .mobi, and .pdf for free http://www.desiringgod.org/books/think-it-not-strange
I would prefer to read it and mark it up in Logos.
Any plans to partner with Desiring God at least for Vyrso or even better Logos books.