Answering my own question a bit, it appears to be "no" (at least short term) -- there's a new Kindle Books with Narration in Kindle Unlimited category with only

Answering my own question a bit, it appears to be "no" (at least short term) -- there's a new Kindle Books with Narration in Kindle Unlimited category with only a couple thousand titles http://www.amazon.com/b?ie=UTF8&node=9630682011 http://www.amazon.com/b?ie=UTF8&node=9630682011