Microsoft has now made available Service Pack 2 for Windows SharePoint.
Since these have only just become available I am yet to fully test them. I do also note that you can also download the complete installation of SharePoint v3 including Service Pack 2:
Windows SharePoint Operations Guide subscribers will finds these updates automatically on the upcoming May 2009 DVD release that is part of their regular update.
You will find that Office 2007 SP2 is also available.