There is a maintenance release, 17B.1, confirmed for Production release on September 22, 2017. This release has been deployed to customer Staging sites for testing and review.
You can follow all Learn release announcements when they are posted in Customer Connect (http://appsconnect.oracle.com) and opt to receive email updates whenever the Learn release announcement is updated.
Release Notes are available and posted on the Release Updates section of Customer Connect. You can also view the release notes in the Knowledge Management document Oracle Learn Cloud Release 17B (Doc ID 2288209.1). Details about the Learn Release schedule can be viewed in the document Oracle Learn Cloud Release Schedule (Doc ID 1983057.1).