The new August Cumulative update for WSSv3 and MOSS has been released and will be available now:
KB 2553022 Description
Full server package download for WSS
Full server package download for MOSS
As usual: After applying the preceding updates, run the SharePoint Products and Technologies Configuration Wizard or “psconfig –cmd upgrade –inplace b2b -wait” on a command line.
This needs to be done on every server in the farm with SharePoint installed!
For all previous updates and service packs, please see the “Build Numbers and Cube Sheet MOSS/WSS”
Office SharePoint Server 2007 (MOSS) and Windows SharePoint Services 3.0 (WSSv3)
All about updating MOSS and Language Packs
Related Update and resource Centers:
Updates for SharePoint Server 2007 and Windows SharePoint Services 3.0
Update Center for Microsoft Office, Office Servers, and Related Products