Here’s Waldo’s description of the new features:
There’s now keyboard navigation within laws and structures, for those power-users who want to flip through laws quickly. There’s baked-in support for Disqus-based commenting on each law page—just enter your site’s Disqus shortname in config.inc.php and you’re up and running. And, finally, there’s bulk generation of both plain text and JSON versions of laws. To what end? Dunno—that’s for you to figure out.
For more details please see Waldo’s complete post.