Open Library is part of the Internet Archive. It makes books available for you to read. That is awesome and that is why Open Library is a natural ally of the Wikimedia community.
At our end we can do more of the things that we do anyway and share what we do. The good news is that Wikidata has a CC-0 license. The people at Open Library can use everything that we do and they do not even have to bother to say thanks.
When we add more Open Library identifiers and VIAF identifier to Wikidata we connect them, us and all the libraries in the world. Yes, individual libraries may have different ways of spelling an author's name but using these connections disambiguation slowly but surely becomes a thing of the past for Open Librarians.
What will we have in return? All the books at Open Library of these authors become available to our readers and editors. We are already in the process of adding identifiers to Wikidata for Open Library. For all the authors that have been connected, we can provide our identifiers to Open Library. This helps them with their outreach and disambiguation.
Through Wikidata more and more authors become connected to VIAF. This allows the librarians of the world to share these freely licensed books with their readers. A clear win-win situation don't you think?