Great news, friends!
Several minutes ago Microsoft anounced availability of SharePoint Server 2016 IT Preview! You can find details here: Announcing availability of SharePoint Server 2016 IT Preview and cloud hybrid search.
Here are some useful SharePoint 2016 links:
SharePoint Server 2016 Preview (download link)
SharePoint Server 2016 IT Preview Reviewer Guide
SharePoint Server 2016 IT Preview Quick Start Guide
SharePoint Server 2016 IT Preview Datasheet
