The monthly Drupal core bug fix release window is scheduled for this Wednesday. However, since the last Drupal 7 bug fix release was only one month ago and there haven't been many changes added to the 7.x development version since then, there won't be a release this week.

Upcoming release windows include:

Wednesday, September 18 (security release window)

Wednesday, October 2 (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.