Next scheduled release: May 9th, 2012
The heads up for this month is; On Tuesday 8th May (US time; Wednesday 9th May AU time) Microsoft expect to release seven (7) bulletins addressing 23 vulnerabilities, of which three (3) have a maximum rating of Critical and four (4) have a maximum rating of Important.
Today we’re releasing our advance notification for the May security bulletin release, which is scheduled for Tuesday, May 8. This month’s release includes 7 bulletins addressing 23 vulnerabilities in Microsoft Windows, Office, Silverlight, and .NET Framework. All 7 bulletins will be released on Tuesday, May 8 at approximately 10 a.m. PDT. 
 Advanced Notification Service for May 2012 Security Bulletin Release (2012-May-03) [MSRC]
 Microsoft Security Bulletin Advance Notification for May 2012 (2012-May-03) [MS]