Still on vacation (get back to work on Monday), but had to post some very important news:

SharePoint Portal Server 2003 Document: Deploying on an Extranet by Using ISA Server 2000 and ISA Server 2004, as promised, was released recently. You can download it at http://www.microsoft.com/downloads/details.aspx?FamilyId=4C5BF9DD-3EFB-451D-B213-98ED039190BF&displaylang=en.