This is the first milestone release of the 7.x cycle. It features a Document Index Tree Finder for the Index Application, integration of the new Tree Widget with the WYSIWYG editor and some usability improvements. Developers have a new Finder Plugin for the Tree Widget and the old Lucene search module was finally retired to Contrib.
Full release notes available at http://www.xwiki.org/xwiki/bin/view/ReleaseNotes/ReleaseNotesXWiki70M1
See http://jira.xwiki.org/secure/IssueNavigator.jspa?reset=true&jqlQuery=category+in+%28%22Top+Level+Projects%22%29+and+fixVersion+in+%28%22%37.%30-milestone-%31%22%29+and+resolution+in+%28%22Fixed%22%29 for more details