Detailed information about what has changed, the new features and more can be found at the 3.1.RC1 Release Announcement.
Check out PrimeFaces downloads page for manual download or if you are maven user update your dependency to 3.1 to migrate to this release.
PrimeFaces User’s Guide has been updated to cover 3.1 and it is available at documentation page.
Next planned release is 3.2 which will introduce some new components, new DataTable features, implementation of most voted feature requests and of course maintenance on current codebase. In summary, we’ll keep rocking!
Always bet on PrimeFaces!