Microsoft published windows vista sp1 today. Here is legal download links:
Overview of Windows Vista SP1 and Download Links
http://www.microsoft.com/downloads/details.aspx?familyid=39B802EA-B2CF-4585-8CEA-2CC6A6247CB3&displaylang=en
http://msdn2.microsoft.com/en-us/windowsvista/bb898842.aspx (subscription links)
http://www.microsoft.com/downloads/details.aspx?familyid=b0c7136d-5ebb-413b-89c9-cb3d06d12674&displaylang=en
