According to a quick note from Helen Foster 2.2 is now ready for the masses [http://moodle.org/mod/forum/discuss.php?d=190991]:
A big THANK YOU to everyone who has helped with QA testing, as listed in the Testing credits.
I’m pleased to announce that the Moodle 2.2 QA cycle has a 100% pass rate, thus Moodle 2.2 is ready for release!
Watch out for the official announcement!