Service Pack 2 Update.
The public update for the Service Pack 2 expiration date issue<http://blogs.msdn.com/sharepoint/archive/2009/05/21/attention-important-information-on-service-pack-2.aspx> is now available for download.
Whoo-hoo, I hope that you caught this one!
The update can be applied before or after Service Pack 2 installation. If the update is applied prior to installing Service Pack 2 it will prevent the expiration date from being improperly activated during installation of Service Pack 2, if it is applied after Service Pack 2, it removes the expiration date incorrectly set during installation of Service Pack 2.
Installation instructions and download links for x86 and x64 are available in this KB: http://support.microsoft.com/kb/971620