Microsoft have released Microsoft Office SharePoint Server (MOSS) Service Pack 2. This can be download from
here. This service pack include all the unreleased fixes, security updates etx. It is strongly recommend to go through the link
Service Pack 2 Improvements to know about the improvements in SP2
Read the complete post at http://dotnetpathak.blogspot.com/2009/05/moss-service-pack-2-released.html