This morning I deployed WordPress 3.7.1 to the network. Besides bug fixes and the latest security updates, the major new features of this version are irrelevant to users of our network. WordPress 3.8, planned for December, will be a release with significant changes to the admin interface.
WordPress 3.7 adds automatic updates and a better password strength checker. However, our WordPress network uses a version control system (Git), and WordPress is smart enough to detect this, and it automatically disables automatic updates. As for passwords, we are not using local WordPress passwords; we are instead using Princeton University's directory servers to manage passwords.
The new update does include improvements to internal search. Search results for sites are now relevance-sorted, in addition to date-sorted.
If WordPress 3.8 does come out in December, I plan to deploy the new version in between semesters.