I can think of a couple of things Sunde might be up to. He might be interested in creating an alternative service for the Kindle to connect to that would download ebooks from TPB, or he might be looking at testing a decryption service, or a way for people who don't own a Kindle to buy Kindle books (though I think that last one would be difficult, requiring purchases of multiple Kindles and some shell games using their PIDs). I'm surprised there wasn't more speculation at the Wired site. I guess their readers don't read many ebooks.