Due to the number of enhancements and improvements to Moodle 2.3 and the fact that many are still being worked on, the QA cycle for Moodle 2.3 has been delayed (subsequently delaying the launch of Moodle 2.3 which was slated for June 4th according to this post by Eloy Lafuente at Moodle.org).
Not to worry though, this release is going to be well worth it. A few of the things that you can expect,
- File usability enhancements
- new Paged course formats (YES!)
- Assignment mod refractoring
- Book module becomes standard/Core
Despite the delay I am still very excited for this next summer release which I think will go a long way in creating a more usable and friendly Moodle platform.
Check out the full roadmap at http://docs.moodle.org/dev/Roadmap