From a DPLA Post by Micah May:
I wanted to take a moment to update you on a promising new piece of DPLA’s ebook work. As part of our efforts to expand access to ebooks and audiobooks, we are currently in talks with Audible about making audiobooks available to libraries through Palace Marketplace (formerly the DPLA Exchange).
We are in the process of working through details about exactly which titles will be available and when, but we can share that we are working toward titles being available in Palace Marketplace in the first quarter of next year, with titles added on a rolling basis. We expect that titles will be available via a variety of licensing models, similar to the deal we announced with Amazon Publishing earlier this year.
Note: Audible is an Amazon.com company.