Just got some time to catch up on my blog reading and noticed that the SharePoint Product Team has released a slipstreamed version of WSS and MOSS with SP1 for both x36 and x64 platforms.

Microsoft Office SharePoint Server 2007 with SP1 (32 bit)
http://www.microsoft.com/downloads/details.aspx?FamilyId=2E6E5A9C-EBF6-4F7F-8467-F4DE6BD6B831&displaylang=en
Microsoft Office SharePoint Server 2007 with SP1 (64 bit)
http://www.microsoft.com/downloads/details.aspx?FamilyId=3015FDE4-85F6-4CBC-812D-55701FBFB563&displaylang=en
Windows SharePoint Services 3.0 with SP1 (32 bit)
http://www.microsoft.com/downloads/details.aspx?familyid=EF93E453-75F1-45DF-8C6F-4565E8549C2A&displaylang=en
Windows SharePoint Services 3.0 with SP1 (64 bit)
http://www.microsoft.com/downloads/details.aspx?familyid=9FB41E51-CB03-4B47-B89A-396786492CBA&displaylang=en

This is great news for those that are wanting to install MOSS or WSS on the new Windows Server 2008 which requires an SP1 install.

For more information regarding this read the post on the product teams blog:
http://blogs.msdn.com/sharepoint/archive/2008/03/07/moss-2007-with-sp1-slipstream-officeserverwithsp1-exe-released.aspx