Seeing how Logos has been publishing a bit of Crossway's stuff lately...why don't you go all the way?
I'd love to have everything Crossway publishes in my Logos library. They already have PDFS of many of their new books. Most of their stuff gets immediately published into Kindle format (they even have a monthly Amazon giveaway).
Logos would be such a better format for them. This is something Logos might be wise to pursue to help readers realize the benefits of Logos for reading (not just study).
Kindle has a iPhone reader. But how much more powerful will the Logos reader be for reading Biblically based books! Getting a popular and quality publisher who obviously makes use of technology like Crossway could be huge in this critical time for Logos to snag the people transitioning to digital reading.