SilverStripe 3.3.0, 3.2.2 and 3.1.17 have been released, and include a number of security fixes of low to important severity.
Details of security fixes included in these releases can be found on the security releases section at http://www.silverstripe.org/download/security-releases/
The changelogs, upgrading notes, and other important information are available on the release notes pages for the appropriate releases:
Features included in 3.3 were covered in the earlier blog post http://www.silverstripe.org/blog/get-your-hands-on-a-new-framework-3-3-0-beta-released.
To get setup, you can install this using composer (as below):
composer create-project silverstripe/installer ./ss33 3.3.0
You can also download pre-built zip / tar from http://www.silverstripe.org/download.
Damian Mooyman | Senior Platform Developer