As described in May 2009, Adobe will be releasing Regular Security Updates. The following is the ‘heads up’ for the JUN-09 release;
Adobe Security Bulletin Advance Notification 
Adobe expects to deliver security updates for Adobe Reader and Acrobat versions 7.x, 8.x, and 9.x for Windows and Macintosh on Tuesday, June 9. This is the first quarterly security update for Adobe Reader and Acrobat as described in our May 20 blog post, and incorporates the initial output of code hardening efforts.
Adobe considers this a critical update and recommends users be prepared to apply the update for their product installations. Details of where to download updates will be posted to Adobe’s Security Bulletins and Advisories support page on June 9.
Details regarding security updates for the UNIX platform will be communicated when available.
The scheduled release on 9th June 2009 coincides with the MS Patch Tuesday release.
 Adobe Security Bulletin Advance Notification (2009-Jun-04) [Adobe PSIRT]