Service pack 1 for WSS 3.0 and MOSS 2007 is now ready for download from the Microsoft download Center:
Here is the link to the SP1 Resource Center which contains additional information:http://technet.microsoft.com/en-us/office/sharepointserver/bb735839.aspx
ATTENTION!As this service pack contains many code changes please be sure to verify it intensivly in your test environment before applying it to your production system!
Also be aware that you will have to run the Post-Setup-Configuration Wizzard (PSCONFIG) after the service pack has been applied. Here is a list of known issues that can occur when running this configuration wizzard:
Please also review the following white paper before planning to upgrade your WSS or MOSS server farm with the service pack:
Also be aware that WSS and MOSS service packs cannot be uninstalled. So be sure to create a complete backup of your databases and files before applying the service pack!
Released a few days ago ... MOSS
Following links are contains moss sp1 details http://blogs.msdn.com/sharepoint/archive/2007/11/29/preview