Service Pack 2 for Microsoft Office SharePoint Server 2007 and Windows SharePoint Services 3.0 have been officially annouced and are available for download from the Microsoft Download Center. I ran across the annoucement on the Microsoft SharePoint Team Blog where you can find links to the knowledgebase articles, downloads, and other resources including installation instructions. Below are quick links for the downloads:
SP2 for WSS 3.0: http://www.microsoft.com/downloads/details.aspx?FamilyId=79BADA82-C13F-44C1-BDC1-D0447337051B&displaylang=en
SP2 for MOSS 2007: http://www.microsoft.com/downloads/details.aspx?FamilyId=B7816D90-5FC6-4347-89B0-A80DEB27A082&displaylang=en
