QA Testing for Moodle 2.3 (due in June) is now underway [announcement].
If you’re interested in checking out all the new features (like the new activities, new course formats, etc.) this is your chance (while contributing back some handy work and feedback to Moodle HQ).
From Tim Barker (HQ Test Manager),
We expect the 2.3 file usability stuff to land shortly. However, other major 2.3 features such as the new Assignment module and Paged Course format are ready for testing.
The QA tests for 2.3 are at http://tracker.moodle.org/browse/MDLQA-1814.