The monthly Drupal core bug fix release window is scheduled for this Wednesday. Although the last Drupal 7 bug fix release was three months ago, there are some big changes that have been committed to Drupal 7.x-dev recently (and a couple more probably on the way soon) that need a little more time to test before a release; additionally, there is one Drupal 7.23 release-blocking change notice not yet written.
So, there will be no release this week, and Drupal 7.23 will have to wait a bit.
Upcoming release windows include:
- Wednesday, July 17 (security release window)
- Wednesday, August 7 (bug fix release window)
For more information on Drupal core release windows, see the documentation on release timing and security releases, and the discussion that led to this policy being implemented.