While the former Nexuiz developers released a Christmas preview of Xonotic, they aren't putting out a stable release or any new game updates in celebration of being around for one year. They do, however, have a new blog post.
Some of the work they talk about in this blog post is full/multiple language support, new game modes and mutators, major improvements to weapons and balance, and global statistics and user management.
"In general we’ve made tremendous progress over the last year, and we’re far from done. We’d like to thank our developers and community for their continued support and efforts to make the game what it is today! Stay tuned, as you can expect a lot more from Xonotic in the future."