Servlet 3.1 is now in public review. Although it is a relatively minor release for the mature Servlet API, this release has a number of important changes, particularly for enabling higher-level frameworks. The Public Review Draft for Servlet 3.1 will end on February 11th so now is the time to download the spec and send in any comments that you might have.
Servlet spec lead Shing Wai Chan is kind enough to summarize the changes and invites you to learn more. The page also contains a download link to the draft spec as well as a link to Shing Wai Chan's JavaOne presentation on Servlet 3.1.
Stay tuned for more JSRs making progress as the steady march towards the Java EE 7 release keeps rolling forward!