The product group released the April 2013 Cumulative Update for the SharePoint 2007 product family.
The KB articles will be available in a couple of days at the following locations:
The Full Server Packages for April 2013 CU are available through the following links:
Related Update Centers:
Important: this is a Post-SP3 hotfix. It is required to first install Service Pack 3 of WSS 3.0 and MOSS 2007 before installing April 2013 CU