Hi, the Moodle 2.3 QA tests are now available in Moodle Tracker. The developers at Moodle HQ are performing some last minute polishing of the 2.3 files usability feature, so the tests for that are currently marked as Moodle QA non-runners.
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. Please run them from there.